如图所示一水平放置的恒定变直径(沿程放大)圆管流,当不计水头损失时,1、2断面形心点 发布时间:2018-01-08 23:25 │ 来源:www.tikuol.com 题型:单项选择题 问题: 如图所示一水平放置的恒定变直径(沿程放大)圆管流,当不计水头损失时,1、2断面形心点压强关系是()。A.p1<p2B.p1=p2C.p1>p2D.不定
题型:单项选择题 给下列句子选择对应的答案。( ) 1. Where do you put the stamp?( ) 2. Thank you. ( ) 3. What's your address? ( ) 4. Where is the shop? ( ) 5. Do you like my letter?A. You're welcome. B. It's 942 Ninth Avenue. C. It's on the Park Road. D. Yes, I do. E. In the top, right corner. 查看答案