题目内容

Which job is(dangerous) _______, a police’s or a fireman’s

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I sincerely thank you for your(invite) _______ to the Industrial Exhibition.

在稳定类基层材料拌和时，应重点检查结合料的剂量、最佳含水量的控制以及拌和方法及均匀性等。（）

A. 对
B. 错

We wish to notify you that Mr. Robert Smart, who has been our representative in Southwest England for the past seven years has left our service and therefore no longer has authority to take orders or collect accounts on our behalf. We have appointed Mr. Fred Peterson in his place.

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