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 probing探测术。revenge报仇，复仇。invasion入侵。expansion扩展，开展，膨胀。exploration探险，勘探，探测。

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