In 1984, President Ronald Reagan proposed that the United States construct a lau

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问题 In 1984, President Ronald Reagan proposed that the United States construct a launch laboratory for a new era of space exploration.

选项 A、probing
B、revenge
C、invasion
D、expansion

答案 A

解析空格处意思是：1984年，罗纳德·里根总统提议美国为太空探索新时代的到来构建太空实验室。划线单词exploration的意思是“探险，勘探，探测”。各项的意思是：probing“探测术”；revenge“报仇，复仇”；invasion“入侵”；expansion“开展，膨胀”。

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