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After the violent earthquake that shook Los Angeles in 1994, earthquake scientists had good news to report: The damage and death toll(死亡人數)could have been much worse.

More than 60 people died in this earthquake. By comparison, an earthquake of similar intensity(強度)that shook America in 1988 claimed 25, 000 victims.

Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 a.m. on a holiday, when traffic was light on the city's highways. In addition, changes made to the construction codes in Los Angeles during the last 20 years have strengthened the city's buildings and highways, making them more resistant to quakes(抗震).

Despite the good news, civil engineers aren't resting on their successes. Pinned to their drawing boards are blueprints(藍圖)for improved quake-resistant buildings. The new designs should offer even greater security to cities where earthquakes often take place.

In the past, making structures quake-resistant meant firm yet flexible materials, such as steel and wood, which bend without breaking. Later, people tried to lift a building off its foundation, and insert rubber and steel between the building and its foundation to reduce the impact of ground vibrations. The most recent designs give buildings brains as well as concrete and steel supports. Called smart buildings, the structures respond like living organisms to an earthquake's vibrations. When the ground shakes and the building tips forward, the computer would force the building to shift in the opposite direction.

The new smart structures could be very expensive to build. However, they would save many lives and would be less likely to be damaged during earthquakes.

6.One reason why the loss of lives in the Log Angeles earthquake was comparatively low is that______.

A.new computers had been installed in the buildings

B.it occurred in the residential areas rather than on the highways

C.large numbers of Los Angeles residents had gone for a holiday

D.improvements had been made in the construction of buildings and highways

7.The function of the computer mentioned in the passage is to______.

A. counterbalance(起平衡作用)an earthquake's action on the building

B. predict(預測)the coming of an earthquake with accuracy

C. help strengthen the foundation of the building

D. measure the impact of an earthquake's vibrations

8.The smart buildings discussed in the passage________.

A. would cause serious financial problems

B. would be worthwhile though expensive

C. would reduce the complexity of architectural design

D. can reduce the ground vibrations caused by earthquakes

9.It can be inferred from the passage that in minimizing(使……最小)the damage caused by earthquakes, attention should be focused on________.

A.the increasing use of rubber and steel in capital construction

B.the development of flexible building materials

C.the reduction of the impact of ground vibrations

D.early forecasts of earthquakes

10.The author's main purpose in writing the passage is to________.

A.compare the consequences of the earthquakes that occurred in the US

B.encourage civil engineers to make more extensive use of computers

C.outline the history of the development of quake-resistant building materials

D.report new developments in constructing quake-resistant buildings

6.解析:選D。細節理解題。由文中第三段第二句話可知,應選D。

7.解析:選A。推理判斷題。由文中倒數第二段最后一句“當地面震動,建筑物傾斜時,電腦會使樓房向相反的方位移去”。

8.解析:選B。推理判斷題。文中最后一段可推斷此題的答案。

9.解析:選C。推理判斷題。文中第三段告訴我們,在過去,為使建筑物防震用的是堅固又柔韌的材料。以后,人們又試圖使建筑物抬高上升,在地基與房子間插入橡膠和鋼材以減輕地面震動時的撞擊。

10.解析:選D。推理判斷題。通讀全文可知本文主要介紹了建設防震房屋的發展過程。

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