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The ratio of the work done by the machine ______the work done on it is called th
The ratio of the work done by the machine ______the work done on it is called th
游客
2024-07-04
40
管理
问题
The ratio of the work done by the machine ______the work done on it is called the efficiency of the machine.
选项
A、against
B、with
C、to
D、for
答案
C
解析
句意:机器所做的工作与在机器上所用的功之比,就称为机器的效率。该题考查的是固定搭配。题中ratio与介词to是固定搭配,the ratio of A to B 的意思为“A与B之比(率)”。
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