离心泵流量调节阀门安装在出口的主要目的是为了防止汽蚀。 发布时间:2017-10-25 10:21 │ 来源:www.tikuol.com 题型:判断题 问题: 离心泵流量调节阀门安装在出口的主要目的是为了防止汽蚀。
题型:判断题 - Have you finished writing your book? - Yes. It _______ and _______ soon.A.is printing; is coming outB.is being printed; will come outC.is going to print, will be come outD.is printed; has come out 查看答案