异步电动机产生不正常的振动和异常的声音,主要有()和()两方面的原因。 发布时间:2017-10-20 18:20 │ 来源:www.tikuol.com 题型:填空题 问题: 异步电动机产生不正常的振动和异常的声音,主要有()和()两方面的原因。
题型:填空题 情景交际。A. Thank you, doctor. B. I am not feeling very well. C. Good afternoon. D. Is it serious? E. Do you have a headache?A: Good afternoon, Dr. Smith.B: __1__ Sit down, please. What's wrong with you?A: I don't know. But __2__ .B: You look pale.__3__ A: Yes.B: Er … Let me check you over first...Oh, you have the flu.A: __4__B: Don't worry. Nothing serious. Take this medicine three times a day.A: __5__ 查看答案
题型:填空题 气田经过详探、分层测试油,并有部分井投入生产,已基本搞清了构造形态、地层特性、储积性质、流体组成、地层压力、地层温度所求得的储量,叫()储量。A.一级储量B.二级储量C.三级储量D.可采储量 查看答案