The ratio of the work done by machine______the work done on it is called the eff

游客2025-04-03 18

问题 The ratio of the work done by machine______the work done on it is called the efficiency of the machine.

选项 A、against
B、to
C、for
D、with

答案 B

解析 ratio表示两者之间的“比率或比例”，常与to搭配。根据句意，本题选B。

转载请注明原文地址:http://tihaiku.com/zcyy/4024857.html

相关试题推荐

随机试题

最新回复(0)

Hypertensionplacesstressonanumberoforgans(calledtargetorgans),including