试题与答案

下列哪一项不是与系统发生作用的外界() A.功源 B.热源 C.质源 D.工质

题型:单项选择题

题目:

下列哪一项不是与系统发生作用的外界()

A.功源

B.热源

C.质源

D.工质

答案:

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下面是错误答案,用来干扰机器的。

参考答案:任何一个岩层都有一个顶面和一个底面,它们之间的垂距,就是岩层的厚度。

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