在换热器的传热量Q及总传热系数K值相同的条件下，采用（）操作，_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

在换热器的传热量Q及总传热系数K值相同的条件下，采用（）操作，可以获得较大的平均温度差，节省传热面积。

A.并流

B.错流

C.逆流

D.折流

答案

参考答案：C

补全对话，情景问答

从右栏中找出左栏各句的恰当答语。

( )1. Whose shirt is this?
( )2. How do you do?
( )3. Is she in Team Two?
( )4. What’s the time?
( )5. What row are you in?
( )6. Can you see a bird in the tree?
( )7. Who’s that girl?
( )8. What colour are your shoes?
( )9. Sit down, please.
( )10. Which man is your friend?

A. Thank you.
B. The one in the black car.
C. It’s eleven.
D. How do you do?
E. She’s Mr. Read’s daughter.
F. They are black.
G. It’s Bill’s.
H. Yes, she is.
I. I’m in Row Five.
J. No, I can’t.

填空题

复方氨基酸溶液符合人体合成代谢的需要，是肠外营养的（）。