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外语
A、It is costly to bring back. B、It is risky to destroy. C、It is of no use on Earth. D、It is damaged by radiation. A题干问的是为什么许多设备留
A、It is costly to bring back. B、It is risky to destroy. C、It is of no use on Earth. D、It is damaged by radiation. A题干问的是为什么许多设备留
admin
2021-01-06
36
问题
(19) One thing about the moon many people don’ t know is that it has a lot of garbage on its surface, leftover from human space exploration. But how much garbage exactly have humans left on the moon? It’ s hard to be accurate, but the trash likely weighs more than 181,000 kilograms on earth. Much of it was left by American astronauts, who landed on the lunar surface between 1969 and 1972 during NASA’ s Apollo Missions. The other rubbish comes from missions that did not have human crews. These missions were conducted by various space exploring agencies, including those from the US, Russia, Japan, India and Europe. Many of the older pieces are equipment sent to learn about the moon. The equipment stayed there after its mission ended.
The moon is also home to lunar orbiters that nabbed the moon before they crashed into its surface, adding to the garbage heap. (20) The objects left by the Apollo astronauts included the equipment that was no longer needed. Bringing back unneeded equipment would have used up precious resources such as fuel. But as the saying goes, "one person’ s trash is another’ s treasure" , (21) researchers can study the garbage left on the moon to see how its materials weathered the radiation and vacuum of space overtime. Moreover, some of the objects on the moon are still being used, including a laser range reflector left by the Apollo 11 crew.
Questions 19 to 21 are based on the passage you have just heard.
19. What does the passage say maybe unknown to many people?
20. Why has a lot of equipment been left on the moon?
21. What can researchers do with the garbage on the moon?
选项
A、It is costly to bring back.
B、It is risky to destroy.
C、It is of no use on Earth.
D、It is damaged by radiation.
答案
A
解析
题干问的是为什么许多设备留在了月球。短文中提到,阿波罗宇航员留下的东西包括不再需要的设备。回收不需要的设备将耗尽宝贵的资源,如燃料,故答案为A(带回来花费太大)。B项(销毁有风险)、C项(对地球没有用)和D项(它因为辐射被损坏了)短文中均未提及,故排除。
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0
大学英语四级
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