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The ratio of the work done by the machine______the work done on it is called the efficiency of the machine.
The ratio of the work done by the machine______the work done on it is called the efficiency of the machine.
admin
2013-06-23
29
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
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)”,故选C。
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大学英语三级A级题库大学英语三级分类
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大学英语三级A级
大学英语三级
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