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A flight to other solar systems will be made more possible by ______. It is difficult to send people to other planets because o
A flight to other solar systems will be made more possible by ______. It is difficult to send people to other planets because o
admin
2009-04-18
66
问题
A flight to other solar systems will be made more possible by ______.
It is difficult to send people to other planets because of ______.
选项
A、lack of capacity of space exploration vehicles.
B、the financial expenditure involved in space travel.
C、controversial nature of space travel.
D、the uncertain future of space exploration.
答案
B
解析
由文章第三段“Perhaps the most difficult problem space planners face is how to finance a vigorous program of piloted space exploration...”可知,人类抵达其他星球的最大问题是资金问题,故选B。
转载请注明原文地址:https://kaotiyun.com/show/FyPd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
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公共英语四级笔试
公共英语(PETS)
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