We could not pull apart two plates which ______ a vacuum, unless we spend great

游客2023-07-15  37

问题 We could not pull apart two plates which ______ a vacuum, unless we spend great strength.

选项 A、removed
B、substituted
C、enclosed
D、replaced

答案 C

解析 题意是:我们不能把______一层真空的两块平板拉开,除非花很大的力气。 [C]enclosed“围绕,包着”,符合题意。[A]removed“移走,移开”,[B]substituted“替代”, [D]replaced“替代”都与题意不符。
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