Question

Have you ever wondered?
Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon (大氣現(xiàn)象) known as the jet stream (氣流). The jet stream is a very high altitude (=" above" sea level) wind which always blows from the west to the east across the Atlantic. So the planes moving at a constant air speed go faster from the west to the east when they are moving with the wind than in the opposite.
What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other buildings float away? What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth. The earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of the string. Things not attached to the earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling (=" top" surface of a room). Most things outside would fly off into space.
小題1:What information can we get from the first passage?

A．It is the jet stream that affects how fast airplanes fly.

B．Planes go slower when they are moving with the wind.

C．It takes more time to fly from NY to London than from London to NY.

D．The jet stream always blows from the east to the west across the Atlantic.

小題2:The underlined word “shoot” in the 2nd paragraph means “_________”.

A．send for

B．move quickly

C．come out

D．grow quickly

小題3:It can be known that without gravity _________.

A．buildings and other structures would float away

B．trees and buildings would not so easily fly off

C．something around your head would not float away

D．everything outside buildings would fly off into space

小題4:Which of the following is not mentioned in the passage?

A．It takes seven hours to travel from London to New York.

B．The earth is moving at a high speed.

C．Things on the earth will float away if there’s no gravity.

D．Things not attached to the earth would fly off in a straight line.

小題5:Where can we read this passage?

A．In a research paper.	B．In a short story.
C．In a travel magazine.	D．In a student’s book

Answer 1

小題1:A
小題2:B
小題3:B
小題4:C
小題5:D

試題分析：這篇短文主要介紹了飛機(jī)為什么向西面飛比向東面飛花的時間更長的原因是氣流的方向。還介紹了沒有了地球引力會發(fā)生什么。
小題1:歸納總結(jié)題。根據(jù)短文第一段主要講述了飛機(jī)為什么向西面飛比向東面飛花的時間更長的原因是氣流的方向，故選A。
小題2:詞意猜測題。A派人去請B快速運(yùn)動C出來D快速生長，根據(jù)第二段People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling (=" top" surface of a room). Most things outside would fly off into space.描述在建筑里的人會突然以一個巨大的速度向上移動直到他們撞上天花板。很多東西會飛到外太空。故選B
小題3:推理判斷題。根據(jù)第三段What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth.描述發(fā)生了什么將取決于東西連接到地球上有多結(jié)實(shí)。再根據(jù)后面描述可知樹以及建筑不像其他物品那樣容易飛出。故選B
小題4:細(xì)節(jié)理解題。根據(jù)短文描述，只提出了問題：關(guān)掉引力，建筑和其他東西會漂走嗎？沒有提及沒有引力地球上的東西將會漂移。故選C。
小題5:出處猜測題。根據(jù)四個選項(xiàng)，A研究論文B小故事C旅游雜志D學(xué)生課本，這是一篇科普短文，有可能來自學(xué)生課本，故選D。