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单选题英语运用能力测试

2011-11-20

Which of the following can be the best title for this passage ?（　　）

A．Education and Success

B．Extracurricular Activities at School

C．Athletic Sports

D．Intellectual Achievement

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参考答案

A

答案解析

暂无解析

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1 People once widely believed that intelligent life existed on Mars . The 19th-centruy discovery of what appeared to be geometric designs cut across the surface was taken as evidence. The lines were thought to have been a system of canals that had been built to irrigate the surface. It is now clear that the “canals” ---perhaps the most spectacular geologic features of Mars – are natural valleys where ancient rivers once flowed.
　　 Another fragmented idea concerns the planet’s seasonal changes in color. Once attributed to the rapid spread of some life-form, these shifts are now known to develop from the movement of fine dust in the atmosphere.
　　 By the close of the 20thcentury none of the many experiments conducted by spacecraft had ever found persuasive evidence of life. Nevertheless, speculation continued over the existence of some form of life ,in either the present of past. In 1996 scientists discovered organic compounds and minerals in a meteorite （陨石），consisting of Martian rock, that collided with Earth around 11,000 B.C. These compounds suggest that Mars may have been inhabited by organisms more than three billion years ago.Why did people in the 19th century believe the existence of intelligent life on mars ?（　　）

A．Because the surface of Mars seemed to be geometri

B．Because the lines were drawn across the surface of the plane

C．Because a system of canals was thought to be ther

D．Because it was the Martians that built the canal

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2 The “canals” on Mars have proved to be according to the passage.（　　）

A．the minor geologic characteristics of Mars

B．natural valleys on the surface of Mars

C．rivers that have kept flowing since ancient times

D．a system that irrigates the whole surface

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3 What are the Mars’ seasonal changes in color believed to be ?（　　）

A．The natural changes on the plane

B．The seasonal cycles .

C．The movement of some life form .

D．The storm of dust in its atmospher

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