A-A+
We could not pull apart two plates which _____
问题详情
We could not pull apart two plates which ______ a vacuum, unless we spend great strength.
A．removed
B．substituted
C．enclosed
D．replaced请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：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。
