问题
问答题 简答题
什么叫离心式通风机的全风压?
答案
参考答案:
全风压是指1立方米气体经风机后获得的外加能量(包括静压能和动压能,忽略位能)
什么叫离心式通风机的全风压?
参考答案:
全风压是指1立方米气体经风机后获得的外加能量(包括静压能和动压能,忽略位能)
从方框中选择恰当的单词填空, 每词用一次. | |
| |
Hi! My __1__ is Wang Ping. I'm thirteen years old. I'm __2__ from Shanghai, China. I can speak Chinese and a __3__ English. My__4__ is August 5th. My favorite __5__ is soccer. I often play soccer with my friends __6__ school. My favorite __7__ is math. I don't like English. It's too __8__. I want a pen pal in Canada. I want my new pen pal to __9__ me with my English. Do you want to be my pen pal? Then write to me soon. My __10__ is 188, Yangpu Road, Shanghai, China. |