螺杆泵的转速较高，目前有的高达（）。另外泵的吸人性能较好，允许输送粘度变化范围大的介 发布时间：2019-02-05 04:07 │ 来源：www.tikuol.com 题型：单项选择题 问题： 螺杆泵的转速较高，目前有的高达（）。另外泵的吸人性能较好，允许输送粘度变化范围大的介质。A.18000r/minB.10000r/minC.5800r/minD.5000r/min
题型：单项选择题 Choose the best response from A to E according to the dialogue. Linda: Hi, Bruce! How was your trip? Bruce: (1) Linda: Where did you go? Bruce: I went to Qingdao with my classmates. Linda: (2) Bruce: It's one of the most beautiful cities in the east of China. I like it very much. Linda: How long did you stay there? ECBAD Bruce: We stayed there for a week. (3) Linda: Which is your favorite place? Bruce: (4) When I was there, I lost myself in the beautiful scenery.Linda: What interesting things did you do there? Bruce: Lots of things, such as swimming, boating, and fishing. (5) Linda: Oh, really? I can't wait to go there. A. I think Sound Lake is the best. B. We've been to many wonderful places. C. How do you like Qingdao? D. But I think riding camels is the most exciting one. E. Oh, it was great. 查看答案