The passage is mainly about _________

公共英语五级

单选题The passage is mainly about __________ 。

A．why a robotic caterpillar can find trapped people
B．how a robotic caterpillar works
C．the instruction of the magnetic caterpillar
D．how a robotic caterpillar crawls

参考答案：A进入在线模考

文章一开始就说“A robotic caterpillar that burrows its way through debris．”这种新型的机器人在瓦砾中寻找幸存者。接下来，则介绍了它的工作原理，说明它为什么能够进入砂砾中去救人。故应选A。

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1根据短文，回答题。

The main reason for the latest rise of oil price is __________ 。
A．global inflation　　　　
B．reduction in supply
C．fast growth in economy
D．Iraq' s suspension of exports

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2It can be inferred from the text that the retail price of petrol will go up dramatically if__________ 。

A．price of crude rises
B．commodity prices rise
C．consumption rises
D．oil taxes rise

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3The estimates in Economic Outlook show that in rich countries__________ 。

A．heavy industry becomes more energy-intensive
B．income loss mainly results from fluctuating crude oil prices
C．manufacturing industry has been seriously squeezed
D．oil price changes have no significant impact on GDP

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