单选题：The ratio of the work done by the machine______________the

题目内容：

The ratio of the work done by the machine______________the work done on it is called the efficiency of the machine. A．against
B．with
C．to
D．for

参考答案：【答案仅供学习，请勿对照自行用药等】

答案解析：

A．giving in　B．giving away　C．giving up　D．giving off

分类：英语三级A级题型：单选题

分类：英语三级A级题型：单选题

Who is calling to the entertainment industry to ensure their responsibility?Th

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根据下列材料，请回答题The following is a passage about laughter. After reading it, you are

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根据下列材料，请回答题This task is the same as Task 1. The 5 questions or unfinished state

分类：英语三级A级题型：单选题