题目内容
局部阻力也称为____。
查看答案
搜索结果不匹配？点我反馈
更多问题
直管阻力也称为____。
管路系统总机械能损失包括直管阻力损失和各种局部阻力损失。
因为边界层分离现象,所以产生了局部阻力。
A: Good morning, Sir. I’m carrying out a consumer satisfaction survey for the airline you’ve just travelled on. 1 a few simple questions for me?B: Certainly. 2, please. I’ll do my best to answer them.A: OK … well, were you, on the whole, satisfied with the service you received?B: Satisfied? Certainly! In fact, I was more than satisfied.A: That’s great. 3our service?B: Well, you see, we weren’t expecting much, the flight was very cheap, so we knew there wouldn’t be any meals. It’s a no-frills airline, isn’t that what they call it?A: Right. 4, then?
微信支付 
支付宝支付