2. 外语
  3. 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.

admin2009-01-05  27
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 ratio表示两者之间的“比率或比例”时，常与to搭配。其他三个介词不能与之构成搭配。
转载请注明原文地址:https://kaotiyun.com/show/WkBK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)