影音先锋制服丝袜_欧美 国产 日本_亚洲欧美综合自拍_亚洲最大成人在线观看_成人一区二区三_色呦呦网站入口_亚洲欧美高清在线_黄页网站在线看_一卡二卡在线观看_在线观看免费黄网站

It is known to us that computer users are being warned by industry experts to pay attention to secret codes which could be used to record their conversation.
E-mails, screen savers, and electronic greeting cards can carry a secret code which is able to turn on the computer’s microphone, make a recording, and forward it to someone else without the user’s knowledge.
In fact any attachments (附件) sent to a computer, whether it is a game of Space Invaders, or a moving picture, can possibly be used to spy (窺探).
Experts say people should always think twice about opening attachments because --- although not common --- bugging (竊聽) by computer can and has been done.
Bill Lyons, head of the Internet Security Company Finjan, said, “People in the army have tested this and you can be sure, if people in general are aware of it, then computer hackers (黑客) are aware of it. The frightening thing is that there are tools on the Internet which people, using a simple search method, can find, and which will enable them to attach this dangerous code to simple attachments.”
小題1:What is the advice given in the passage?
A．Use secret codes to record other people’s conversation.
B．Be careful when opening an attachment.
C．Never open any attachments.
D．Never use secret codes.
小題2:What worries the experts is that ___ .
A．nobody seems to believe such things
B．nobody knows the danger of the code
C．tools can easily be used to tie dangerous codes to e-mails
D．effective ways can never be found to deal with the problem.
小題3:Which of the following is TRUE according to the passage?
A．A moving picture cannot be used to spy.
B．Electronic greeting cards cannot carry a secret code.
C．A secret code is used to destroy the computer system.
D．Any attachments sent to a computer may carry a secret code.

小題1:B
小題2:C
小題3:D

試題分析：本文主要講了專家提醒打開一個附件的時候，一定要小心。專家擔(dān)心的是電子郵件中，可以利用工具輕而易舉地捆綁危險編碼。
小題1:細節(jié)題。根據(jù)Experts say people should always think twice about opening attachments because --- although not common --- bugging (竊聽) by computer can and has been done.可知這篇文章給出的建議是當打開一個附件的時候，一定要小心，故選B。
小題2:細節(jié)題。根據(jù)E-mails, screen savers, and electronic greeting cards can carry a secret code which is able to turn on the computer’s microphone, make a recording, and forward it to someone else without the user’s knowledge.In fact any attachments (附件) sent to a computer, whether it is a game of Space Invaders, or a moving picture, can possibly be used to spy (窺探).可知令專家擔(dān)心的是電子郵件中，可以利用工具輕而易舉地捆綁危險編碼，故選C。
小題3:細節(jié)題。根據(jù)The frightening thing is that there are tools on the Internet which people, using a simple search method, can find, and which will enable them to attach this dangerous code to simple attachments.故選D。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：閱讀理解

The first flights of the new airlines that will take tourists into space are ready to take off in 2012, and getting a seat on one is not all that different from booking a trip someplace on Earth. You can sign up on the website of, say, Virgin Galactic，the most well­known of the new space tourism companies, or go to an approved travel agency and put down a large deposit. Soon you will be able to buy travel insurance，just as you can for any other vacation.
Until now，space tourism has been limited to the ultrawealthy. Just seven people have paid tens of millions of dollars each for a trip to the International Space Station aboard a Russian rocket.
But that could change this year, when Virgin Galactic intends to start offering flights just beyond the space barrier on a rocket ship it has built, featuring five minutes of weightlessness during a two­and­a­half­hour tour. At $ 200,000 a seat, this will open the final frontier to far more people.
At least two other specialty airlines have jumped in as well, taking reservations and deposits for future space flights.Allianz, the big insurer, will introduce an insurance product in 2012, lending space tourism the trappings of the regular travel industry.
“Just to be able to sell space travel as a regular part of your business, really, just how cool is that？” said Lynda Turley Garrett, president of Alpine Travel of Saratoga, Calif.，who is one of 58 accredited space agents for Virgin Galactic in the United States.
In five years，Ms.Garrett has sold three seats. But she expects that to change once passengers start going up and coming down to tell their friends. “By 2017，it'll be just like scheduling a flight to L．A.，” Ms.Garrett predicted.
小題1:If you want to book a flight to space in 2012, you can________.
A．go to any travel agency
B．telephone Virgin Galactic
C．pay a visit to Allianz
D．sign up on the website of Virgin Galactic
小題2:From Paragraph 2 we can know that ________.
A．only the extremely rich people can afford the space trip
B．seven people have paid tens of millions of dollars for a space trip
C．Russia is the first country to build the space station
D．ordinary people are not allowed to take space tour
小題3:Which of the following is true of Virgin Galactic?
A．It is one of the approved space agencies.
B．It is a famous space tourism company.
C．It sells insurance products to space tourists.
D．Its rocket has carried space passengers successfully.
小題4:What does the underlined word “trappings” in Paragraph 4 probably refer to?
A．Standard uniforms.
B．Traditional decorations.
C．Symbolic signs.
D．Personal belongings.
小題5:What does Ms. Garrett think of the future space travel?
A．Common.　B．Changeable.
C．Flexible.　D．Reasonable.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Play allows children to use their creativity while developing their imagination and physical, cognitive (認知的), and emotional strength. Play is important to healthy brain development. Play allows children to create and explore a world they can master, conquering their fears while practicing adult roles. Undirected play allows children to learn how to work in groups, to share, to negotiate, and to resolve conflicts.
Ideally, much of play involves adults, but when play is controlled by adults, children acquiesce (順從) to adult rules and concerns and lose some of the benefits play offers them, particularly in developing creativity, leadership, and group skills. In contrast to passive entertainment, play builds active, healthy bodies. In fact, it has been suggested that encouraging unstructured play may be an exceptional way to increase physical activity levels in children, which is one important strategy in the resolution of the obesity problem.
Children’s development is critically influenced by appropriate, affective relationships with loving and consistent caregivers as they relate to children through play. When parents observe their children in play or join with them in child-driven play, they are given a unique opportunity to see the world from their children’s vantage point as the child navigates a world perfectly created just to fit his or her needs. The interactions that occur through play tell children that parents are fully paying attention to them and help to build enduring relationships. Parents who have the opportunity to look at their children’s world learn to communicate more effectively with their children and are given another setting to offer guidance. Less verbal children may be able to express their views, giving their parents an opportunity to gain a fuller understanding of their perspective. Quite simply, play offers parents a wonderful opportunity to engage fully with their children.
Play is essential to the academic environment. It ensures that the school setting attends to the social and emotional development of children as well as their cognitive development. It has been shown to help children adjust to the school setting and even to strengthen children’s learning willingness. Social-emotional learning is best integrated (融合) with academic learning; it is concerning if some of the forces that enhance children’s ability to learn are improved at the expense of others. Play and unscheduled time that allow for peer interactions are important components of social-emotional learning.
小題1:Compared with undirected play, play which is controlled by adults ________.
A．doesn’t benefit the children at all
B．doesn’t help develop leadership and group skills
C．makes children become more active
D．helps increase physical activity levels
小題2:The third paragraph mainly tells us that ________.
A．play offers parents a good chance to establish good relationships with children
B．children’s development is greatly influenced by relationships with parents
C．play helps children better express their views
D．play offers parents a unique opportunity to see the world from a different perspective
小題3:From the last paragraph, we know that ________.
A．play can’t help children become adapted to the school setting
B．play makes social-emotional learning and academic learning separated
C．play is beneficial to social-emotional learning as well as academic learning
D．it is necessary to strengthen children’s academic development at the expense of others
小題4:Which of the following statements is NOT true?
A．Undirected play can help children develop team spirit.
B．Play can improve children’s willingness to learn.
C．Play helps adults gain a better understanding of the children’s thoughts.
D．Adults shouldn’t be involved in children’s play.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解



At the moment, there are two reliable ways to make electricity from sunlight. You can use a panel of solar cells to create the current directly, by liberating electrons from a semiconducting material such as silicon. Or you can concentrate the sun’s rays using mirrors, boil water with them, and employ the steam to drive a generator.
Both work. But both are expensive. Gang Chen of the Massachusetts Institute of Technology and Zhifeng Ren of Boston College therefore propose an alternative. They suggest that a phenomenon called the thermoelectric（熱電）effect might be used instead—and they have built a prototype（原型）to show that the idea is practical.
Thermoelectric devices are not new. They are used, for example, to capture waste heat from car engines. They work because certain materials generate an electrical potential difference within themselves if one part is hotter than another. That can be used to drive a current through an external circuit.
The reason thermoelectric materials have not, in the past, been applied successfully to the question of solar power is that to get a worthwhile current you have to have a significant temperature difference. (200℃ is considered a good starting point.) In a car engine, that is easy. For sunlight, however, it means concentrating the heat in some way. And if you are going to the trouble of building mirrors to do that, you might as well go down the steam-generation route, which is a much more efficient way of producing electricity. If the heat concentration could be done without all the equipment of mirrors, though, thermoelectricity’s inefficiency would be balanced by the cheapness of the equipment.
In their view, three things are needed to create a workable solar-thermoelectric device. The first is to make sure that most of the sunlight which falls on it is absorbed, rather than being reflected. The second is to choose a thermoelectric material which conducts heat badly but electricity well. The third is to be certain that the temperature gradient（梯度）which that badly conducting material creates is not wasted by poor design.
小題1:The following methods can be adopted to make electricity from sunlight EXCEPT         .
A．putting a panel of solar cells into use
B．concentrating sun’s rays with mirrors
C．creating a solar-thermoelectric device
D．building a practical solar prototype
小題2:Why was the application of thermoelectric materials a failure in the past?
A．Because it’s hard for them to build enough mirrors to make it work.
B．Because 200℃ was hard to reach at that time even in a car engine.
C．Because of the failure of having a significant temperature difference.
D．Because it was hard to focus the sun’s rays with equipment of mirrors.
小題3:Which of the following is the best title for this passage?
A．Thermoelectric Device --- the Best Method of All
B．A New Method of Making Electricity from Sunlight
C．How to Create a Workable Thermoelectric Device
D．Solar Power --- a New Energy Trend in the Future

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Some students get so nervous before a test; they do poorly even if they know the material. Sian Beilock has studied these highly anxious test-takers.
Sian Beilock: “They start worrying about the consequences. They might even start worrying about whether this exam is going to prevent them from getting into the college they want. And when we worry，it actually uses up attention and memory resources. I talk about it as your cognitive horsepower that you could otherwise be using to focus on the exam.”
Professor Beilock and another researcher，Gerardo Ramirez，have developed a possible solution. Just before an exam，highly anxious test-takers spend ten minutes writing about their worries about the test.
Sian Beilock: “What we think happens is when students put it down on paper，they think about the worst that could happen and they reappraise the situation. They might realize it’s not as bad as they might think it was before and，in essence(本質(zhì)上)，it prevents these thoughts from popping up when they’re actually taking a test.”
The researchers tested the idea on a group of twenty anxious college students. They gave them two short math tests. After the first one, they asked the students to either sit quietly or write about their feelings about the upcoming second test.
The researchers added to the pressure. They told the students that those who did well on the second test would get money. They also told them that their performance would affect other students as part of a team effort.
Professor Beilock says those who sat quietly scored an average of twelve percent worse on the second test. But the students who had written about their fears improved their performance by an average of five percent.
Next, the researchers used younger students in a biology class. They told them before final exams either to write about their feelings or to think about things unrelated to the test.
Prefessor Beilock says highly anxious students who did the writing got an average grade of  B+，compared to a B－ for those who did not.
Sian Beilock: “What we showed is that for students who are highly test-anxious，who’d done our writing intervention(排解)，all of a sudden there was no relationship between test anxiety and performance. Those students most likely to worry were performing just as well as their classmates who don’t normally get nervous in these testing situations.”
But what if students do not have a chance to write about their fears immediately before an exam or presentation? Professor Beilock says students can try it themselves at home or in the library and still improve their performance.
小題1:Which of the following is TRUE?
A．The result in the math test agrees with that in the biology test.
B．In the first math test, students who sat quietly performed better.
C．In the second math test, students who wrote about their feelings did worse.
D．Some college students are highly anxious test-takers while others are not in the tests.
小題2:What may happen if students have the problem of test anxiety?
A．Test anxiety is sure to cause students to fail the test.
B．Test anxiety can improve students’ performance to some degree.
C．Students’ attention and memory resources run out when worried.
D．Students may not be admitted into their favorite college if worried
小題3:The result of the research suggests that ________．
A．proper amount of burden may turn out to be a good thing
B．facing the fears bravely may help one to achieve more
C．a(chǎn)voiding facing the problem may contribute to relaxation
D．taking no action before difficulty may result in success
小題4:What is the main idea of the passage?
A．It is important for students to overcome test anxiety.
B．Anxious students overcome test anxiety by writing down fears.
C．It is a common practice for students being worried before a test.
D．Being worried before tests does harm to students’ performance.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Many people are aware of the beauty of a solar eclipse (日食), but are surprised to learn that lunar eclipses are often just as impressive. While total solar eclipse lasts only for a few minutes and can be seen only in a small area of a few kilometers, total lunar eclipse can last for several hours and can be seen over much of the planet. In fact, the beauty and stability of lunar eclipses make them a favorite of both amateur and professional photographers.
Lunar eclipses generally occur two or three times a year, and are possible only when the Moon is full. When we see the Moon, we are actually seeing sunlight reflected off the surface of the Moon When the Earth is positioned in between the Moon and the Sun, however, the Earth's shadow falls on the Moon, and a lunar eclipse occurs.
The type of lunar eclipse - total, partial, or penumbral (半影) - that occurs depends both on how much of the Moon passes through the Earth's shadow and through which part of the shadow it passes. A penumbral eclipse occurs when the Moon passes through the Earth's outer shadow. This type of eclipse is brief and frequently goes unobserved by all but astronomers. By contrast, total and partial eclipses occur when all or part, respectively, of the Moon passes through the umbra（本影） shadow of the Earth. These eclipses are quite easy to see and are widely observed.
Unlike solar eclipses, lunar eclipses are safe to watch. Solar radiation that occurs during an eclipse of the Sun can cause a form of burns of one's eyes known as eclipse blindness. In fact, the only way to safely view a solar eclipse is by using specially designed equipment. However, since the Moon's light is reflected sunlight, it is completely safe to watch a lunar eclipse without any special equipment, although a pair of binoculars can certainly help the viewer appreciate the beauty of this phenomenon
小題1:The underlined word "stability " most probably means_______.
A．strengthB．positionC．steadinessD．visibility
小題2:According to the passage, a partial lunar eclipse occurs________.
A．when the Moon passes between the Sun and the Earth
B．when all of the Moon passes through the Earth's umbra shadow
C．when only a part of the Moon passes through the Earth's outer shadow
D．when only a part of the Moon passes through the Earth's umbra shadow
小題3:The passage implies that penumbral eclipses are________.
A．longer-lasting than most solar eclipses
B．more common than partial or full lunar eclipse
C．the result of the shadow cast by the Moon onto the Earth
D．more difficult to observe than other types of lunar eclipse
小題4:According to the passage, it is safe to watch a lunar eclipse, unlike a solar eclipse, because ________.
A．moonlight is less strong than sunlight
B．a(chǎn) lunar eclipse is briefer than a solar eclipse
C．a(chǎn) lunar eclipse lasts much longer than a solar eclipse
D．special equipment can be employed to view a lunar eclipse

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

 Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.
Waste can bring a lot of problems. Although China is rich in some resources(資源), we are short of(缺乏) others, for example, fresh water(淡水). It is reported that we will have no coal(煤) or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move? Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.
In our everyday life, we can do many things to prevent waste from happening, for example, turn off the water taps(水龍頭) when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will be changed. Waste can be stopped one day, if we do our best.
小題1:From the passage we know that some students often _______ in the school.
A．eat too muchB．don’t work hardC．waste thingsD．throw rubbish everywhere
小題2:Which is not mentioned in this passage?
A．Fresh water.B．Forest.C．Oil.D．Coal.
小題3:What may happen in 100 years?
A．We may still have enough oil.B．We may still have enough coal.
C．We may have a little oil.D．We may have no coal or oil to use.
小題4:Which is the best title of this passage?
A．Stop WastingB．School life
C．Waste in the SchoolD．Rich Resources in China

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Online Communication
In an age when technology moves faster than most can keep up with, a small group of people still remain in the time of old-fashioned letter. Frankly speaking, I was once certain that traditional letters could never be replaced by other means of communication.
But a story about online communication changed my mind.
An old man, who suffered a lot from Parkinson’s disease, was not able to talk clearly and could hardly write his name. Living totally alone, he managed to keep in touch with nearly all the members of his family. How did he achieve this? He clicked out words on his computer keyboard.
I, therefore, managed to get an E-mail box as soon as the opportunity came. My life changed. E-mail, and all online communication, is something truly different. It has capabilities（能力） that few other products can match.
E-mail is convenient. It takes less time with its fast speed and 24-hour connection. The slow postal service is no match. If you wouldn’t want to have a face-to-face talk with your manager, you might talk with him through E-mail even if you are in the same office.
Naming all the good things about online communication is not easy. But wait. E-mail can be inconvenient. It can waste time and energy. Just think what may happen when you take a short vacation and return to find your e-mail box filled with 200 unread messages. You could easily spend half a day clearing junk ads.
Then, online communication will keep us staying at our computer while it connects us to distant strangers. Once we throw ourselves into the machine, we may forget the human touches we once held so dear. I’m sure there is and always will be a place for the old-fashioned letter, phone call, and face-to-face meeting… even in the world of modern communication.
As I listen to the sound of the modem(調(diào)制解調(diào)器), I was excited at stepping out to the outside world but, at the same time, I sensed a loss of control over something valuable in my personal life.
小題1:What is the most probable meaning of the underlined word “junk” in paragraph6?
A．old and uselessB．New and usefulC．Short but valuableD．Long but clear
小題2:What does the writer think of online communication?
A．It should replace old-fashioned letters completely.
B．It is perfect and always does good to you.
C．It is extremely useful and convenient, but it may be inconvenient or even harmful.
D．It does more harm than good.
小題3:What caused the writer to become interested in E-mail and online communication?
A．The sound of the modem.B．His own illness.
C．The changing of his life.D．A sick old man’s experience.
小題4:According to the writer, traditional means of communication will never disappear because ________.
A．they are convenient and popular though they are slow
B．they help to keep the friendly relationship between people
C．most people cannot keep up with the development of technology
D．modern means of communication does too much harm
小題5:How did the sick old man keep in touch with his family members?
A．With the help of his computer.B．By writing letters with his pen.
C．By making telephone calls.D．By visiting them regularly.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Today, there are many chances for those who wish to continue their education. However, nearly all require some break in one’s career in order to attend school full time.    　　
Part-time education, that is, attending school at night or for one weekend a month, tends to drag the process out over time and puts the completion of a degree program out of reach of many people. Additionally, such programs require a fixed time commitment which can also impact negatively on one’s career and family time. 
Of the many approaches to teaching and learning, however, perhaps the most flexible (靈活的) is that called distance learning. Distance learning is an educational method which allows the students the flexibility to study at his or her own pace to achieve the academic goals which are so necessary in today’s world. The time required to study may be set aside at the student’s convenience. Additionally, the student may enroll in distance learning courses from actually any place in the world, while continuing to pursue their chosen career. Individual assistance may be available via regular airmail, telephone, fax machine, teleconferencing and over the Internet.
Good distance learning programs are characterized by the inclusion of a subject evaluation tool with every subject, so a student doesn’t need to travel away from home to take a test. Another characteristic of a good distance learning program is the equivalence (等同) of the distance learning course with the same subject materials as those students taking the course on the home campus. The resultant diploma or degree should also be the same whether distance learning or on-campus study is employed. The individuality of the professor/student relationship is another characteristic of a good distance learning program. In the final analysis, a good distance learning program has a place not only for the individual student but also the company or business that wants to work in partnership with their employees for the educational benefit, professional development, and business growth of the organization. Supporting distance learning programs for their employees gives the business the advantage of retaining (留住) career-minded people while contributing to their personal and professional growth through education. 　　
小題1:According to the passage, which of the following is NOT a disadvantage of part time education?
A．It requires some break in one’s career. 　　
B．It tends to last too long for many people to complete a degree program.　　
C．It affects one’s career.　　
D．It gives the student less time to share with the family.
小題2: Which of the following is NOT an advantage of distance learning?  　
A．The student may choose his or her own pace.　
B．The student may study at his or her convenience.　　
C．They can pursue their chosen career while studying.　　
D．Individual assistance comes through regular airmail, telephone and fax machine.
小題3:What benefit will distance learning program bring to a business?   　　
A．Attracting more talented people.　　
B．Good image of the business.　　
C．Better cooperation with universities.　　
D．Further training of employees and business growth.
小題4: Good distance learning program have the following characteristics EXCEPT _______.    　　
A．distance learning course is the same as students taking courses on campus　
B．the diploma or degree should be the same as on campus study　　
C．professor-student relationship is strictly one to one all through the course　　
D．includes subject evaluation tool
小題5:What benefit will distance learning bring to an employee of a business?    　　
A．Higher salary.　　
B．Professional growth.　　
C．Good impression on the employer.　　
D．Good relationship with the employer.

查看答案和解析>>

同步練習(xí)冊答案
久久国产色av免费观看| 亚洲第一精品区| 亚洲精品中文字幕乱码三区91| 国产黄色的视频| 日本激情一区二区三区| 国产一卡二卡在线| 欧美成人三级在线视频| 天天躁日日躁狠狠躁av| 国产视频1区2区| 青青草av网站| 男人操女人的视频网站| 极品人妻一区二区| 免费无码国产精品| 国产九九热视频| 老司机午夜网站| 91九色蝌蚪porny| 一本色道久久综合无码人妻| 在线观看岛国av| 人妻激情另类乱人伦人妻| 五月天激情小说| jizz国产视频| aaa人片在线| 国产 porn| 无码毛片aaa在线| 五月婷婷深深爱| 中文字幕一区二区三区四区视频| 日韩av片专区| 亚洲熟妇av日韩熟妇在线| 欧美精品日韩在线| 中国xxxx性xxxx产国| 国产男女猛烈无遮挡| 男女视频免费看| 日日干夜夜操s8| 亚洲av鲁丝一区二区三区| 巨乳女教师的诱惑| 精品国产九九九| 伊人久久久久久久久久久久| 免费成人在线视频网站| 91精品国产高清一区二区三蜜臀| 五月婷婷综合在线观看| 天天操天天干天天舔| 中文字幕第315页| 青青操免费在线视频| 色婷婷激情视频| 免费观看成人在线视频| 欧洲精品在线播放| 国产女人被狂躁到高潮小说| 在线观看日本中文字幕| 亚洲欧美日本在线观看| 在线观看中文字幕网站| 免费看日韩毛片| 久久久久香蕉视频| 91欧美一区二区三区| 激情六月丁香婷婷| 国产精品va无码一区二区| 亚洲精品国产suv一区88| 欧美三级黄色大片| eeuss中文字幕| 怡红院一区二区三区| 李宗瑞91在线正在播放| 无码国产精品一区二区色情男同| www.久久成人| 午夜精品久久久久久久96蜜桃| 亚洲中文字幕在线一区| 一区二区精品视频在线观看| 欧美 日韩 精品| 亚洲免费激情视频| 日韩黄色在线视频| 五月婷婷激情网| 日韩精品成人一区| 91网址在线观看精品| 亚洲欧洲日产国码无码久久99| www.av毛片| 2018日日夜夜| 日韩av在线第一页| 农村妇女精品一二区| 成人在线免费播放视频| 日本熟妇人妻中出| 性欧美1819| 久久激情免费视频| 91视频免费网址| 极品国产91在线网站| 日本一区二区欧美| 懂色av中文字幕| av网站免费大全| 午夜影院在线视频| 国产美女视频免费观看下载软件| 台湾佬美性中文| 噜噜噜在线视频| 国产又粗又猛又爽又黄的视频小说| 亚洲图片第一页| 最新中文字幕久久| av免费观看大全| 成人中文字幕av| 久草视频免费在线| 亚洲欧美一区二区三区在线观看| 91视频在线视频| 精品国产黄色片| 中文在线字幕观看| 久久精品女同亚洲女同13| 久久久久久国产精品无码| 午夜国产小视频| 无码 制服 丝袜 国产 另类| 日韩一级片播放| 国产无码精品在线观看| 伊人久久中文字幕| 亚洲第一页视频| xxxx黄色片| 最新中文字幕久久| 无码人妻精品一区二区三区66| 天天视频天天爽| av图片在线观看| 午夜精品久久久久久久96蜜桃| 欧美久久久久久久久久久| 久久久久无码精品国产sm果冻| www.毛片com| 欧美精品第三页| 天堂中文在线网| 欧美视频在线观看一区二区三区| 亚洲精品女人久久久| 粉嫩av蜜桃av蜜臀av| 手机福利在线视频| 99sesese| 一级黄色录像大片| 国产激情第一页| 天堂а√在线中文在线| 五月天av在线播放| 九九热最新视频| 岛国大片在线免费观看| 老熟妻内射精品一区| 亚洲性生活网站| 无码免费一区二区三区| 国产suv精品一区二区69| 国产精品无码在线| 99在线观看视频免费| 日本高清免费在线视频| 97人妻精品一区二区三区动漫| 国产午夜在线一区二区三区| 手机看片日韩国产| 欧美国产日韩综合| 俄罗斯嫩小性bbwbbw| www.日本高清视频| av五月天在线| 国产精品老熟女视频一区二区| xxxxxx黄色| 欧美一级视频免费看| 国产一级特黄aaa大片| 天堂成人在线视频| 国产盗摄视频在线观看| 久久精品第一页| 国产精品高潮呻吟AV无码| 日批在线观看视频| 99热在线这里只有精品| 超碰在线97观看| 国产又粗又猛又爽视频| 日本999视频| 国产女人18毛片水18精| 日本一道本视频| 玖玖爱视频在线| 黑人精品一区二区三区| 国产a免费视频| 国产一级大片在线观看| 佐山爱在线视频| 青青草精品视频在线| 亚洲精品无码久久久久| 久久美女免费视频| 精品久久久99| 五月婷婷丁香花| 国产精品无码一区二区在线| 一区不卡在线观看| 国产免费看av| 国产亚洲视频一区| 日本wwww色| 波多野结衣家庭教师视频| 国产精品熟女久久久久久 | 人妻 日韩精品 中文字幕| 稀缺小u女呦精品呦| 欧美私人情侣网站| 成人激情四射网| www.一区二区.com| 一卡二卡三卡在线| 男女h黄动漫啪啪无遮挡软件| 久久国产视频播放| 自拍偷拍你懂的| 日本熟妇色xxxxx日本免费看| 香港三级日本三级| 国产精品久久久久久久av福利| 亚洲精品久久久久久动漫器材一区| 国产经典久久久| 国产成人精品一区二区色戒| 99鲁鲁精品一区二区三区| 日韩三级视频在线播放| 91l九色lporny| 日韩熟女精品一区二区三区| 精品1卡二卡三卡四卡老狼| 一本色道久久亚洲综合精品蜜桃| 久久无码人妻一区二区三区| 日本熟妇人妻中出| 黑人玩弄人妻一区二区三区| 奇米视频7777| 五级黄高潮片90分钟视频| 久久国产免费观看| 日本欧美一区二区三区不卡视频| 手机在线视频一区| 18禁裸乳无遮挡啪啪无码免费| 奇米777在线视频| 一级性生活毛片| 黄色激情视频在线观看| 欧美a级片免费看| 日本少妇全体裸体洗澡| 日韩一卡二卡在线观看| 一级片在线免费播放| 成人区一区二区| 涩涩视频免费看| 图片区乱熟图片区亚洲| 亚洲中文字幕无码av| 日本熟妇乱子伦xxxx| 91视频综合网| 99国产精品欲| 日韩欧美黄色大片| 人人妻人人藻人人爽欧美一区| 国产成人在线观看网站| 在线观看亚洲大片短视频| 波多野结衣高清在线| 欧美图片激情小说| 丰满少妇xbxb毛片日本| 日韩成人高清视频| 特级西西人体www高清大胆| 亚洲美女综合网| 国产3p在线播放| 肉色超薄丝袜脚交69xx图片| 国产麻豆精品一区| 国产精品一区二区小说| 超碰人人干人人| 国产成人三级一区二区在线观看一| 免费黄色日本网站| 国产精品19p| 国产成人免费观看视频| 日韩精品综合在线| 中文字幕在线视频播放| 国产成人一级片| 精品人妻一区二区三区四区在线| 波多野结衣三级视频| 黄色片免费观看视频| 欧美一级欧美一级| 日韩人妻一区二区三区| 中文字幕人妻一区二区在线视频 | 日日夜夜精品视频免费观看| 2025国产精品自拍| 99草在线视频| 久青草免费视频| 91免费黄视频| 乐播av一区二区三区| 国产特级黄色片| 欧美日韩综合一区二区| 蜜臀av性久久久久蜜臀av| 国产一级免费片| 中文字幕精品无码亚| 一区二区三区视频网| 一区二区三区日韩视频| 少妇熟女视频一区二区三区| 污污网站免费看| 久久久天堂国产精品| 亚洲第一黄色网址| 国产欧美一区二区三区视频在线观看| 日本激情综合网| 熟妇熟女乱妇乱女网站| 在线xxxxx| www.日韩在线观看| 免费又黄又爽又色的视频| 国产真人做爰毛片视频直播| 国产伦精品一区二区三区视频女| av免费在线不卡| 特级毛片www| 牛夜精品久久久久久久| 国产精品免费看久久久无码| b站大片免费直播| 国产老头和老头xxxx×| 国产精品suv一区二区三区| 欧美日韩大尺度| 精品久久久无码人妻字幂| 日韩人妻一区二区三区| 天天色天天操天天射| jizz国产在线观看| 久久97人妻无码一区二区三区| 国产成人a亚洲精v品无码| 超碰免费在线公开| 一级片久久久久| 91精品国产高清91久久久久久| 在线视频你懂得| 久久国产精品免费看| 久久人人爽人人片| www.天天射.com| 欧美一级黄色录像片| 成人午夜免费影院| 巨胸大乳www视频免费观看| 亚洲午夜精品在线观看| 懂色av成人一区二区三区| 国产又粗又大又爽| 久久久美女视频| 午夜精品免费看| 九九热在线免费| 久久久精品在线视频| 黄色一级视频在线播放| 国产三级黄色片| 亚洲精品一区二区三区影院忠贞| 日韩综合第一页| 蜜桃视频无码区在线观看| 亚洲精品国产一区二| www.97av| 国产高清在线免费| 国产伦精品一区二区三区四区 | 亚洲av成人精品日韩在线播放| 日本高清视频网站| 国内自拍偷拍视频| 内射中出日韩无国产剧情| 日韩av在线看免费观看| 蜜桃av免费在线观看| 亚洲欧美一区二区三区四区五区| eeuss中文| 1024av视频| 91极品尤物在线播放国产| 在线观看日本www| 午夜精品三级久久久有码| 亚洲中文无码av在线| 91tv国产成人福利| 熟妇人妻av无码一区二区三区| 中国男女全黄大片| 精品无码一区二区三区 | 成人中文字幕在线播放| 少妇激情一区二区三区| 毛片aaaaa| 国产成人av免费| 少妇喷水在线观看| 鲁大师私人影院在线观看| 免费看一级黄色| 丰满少妇大力进入| 亚洲精品www.| 欧美啪啪小视频| 精品人妻av一区二区三区| 亚洲欧美日韩中文字幕在线观看| 青青草福利视频| 麻豆一区二区三区在线观看| 国产a级片免费观看| 日韩免费一二三区| 国产欧美一级片| 日本少妇xxxx| 男人的天堂成人| 女性隐私黄www网站视频| 久久亚洲av午夜福利精品一区| 日批视频免费观看| 超级砰砰砰97免费观看最新一期 | 污片在线免费看| 一级片免费在线播放| 好吊视频一二三区| 人妻少妇无码精品视频区| 亚洲区成人777777精品| 免费涩涩18网站入口| 加勒比在线一区| 少妇高潮一69aⅹ| 九九热最新地址| 男人添女人下面免费视频| 天天干,天天干| 国产高潮失禁喷水爽到抽搐 | 国产999久久久| 亚洲AV无码片久久精品| 日韩精品在线中文字幕| 久久综合加勒比| 欧美一区二区黄片| 后入内射无码人妻一区| 人妻无码视频一区二区三区| 五月天激情四射| 国产午夜在线一区二区三区| 精品嫩模一区二区三区| 久久人人爽人人爽人人| 亚洲产国偷v产偷v自拍涩爱| 能直接看的av| www.xxx亚洲| 97av免费视频| 精品一区二区三孕妇视频| 国产1区2区在线| 中文字幕一区二区三区波野结| 伊人网综合视频| 国产精品一区二区免费在线观看| 国产一级一片免费播放| 中文字幕人妻无码系列第三区| 日韩第一页在线观看| 久草资源在线视频| 制服下的诱惑暮生| 免费高清一区二区三区| 台湾佬中文在线| 丰满少妇在线观看资源站| 久久婷婷国产精品| 91成人在线免费| 久久国产精品国语对白| 久热精品在线观看| 黑人玩弄人妻一区二区三区| 日韩a∨精品日韩在线观看| 国产成人无码专区| 欧美 日韩 成人|