问题
单项选择题
离心式风机集流器的作用是保证气流均匀的充满叶轮进口，使风机进口处的（）尽量减少。
A.风压
B.风速
C.阻力
D.流量
答案
参考答案：C
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离心式风机集流器的作用是保证气流均匀的充满叶轮进口，使风机进口处的（）尽量减少。
A.风压
B.风速
C.阻力
D.流量
参考答案：C
| Read and match. (读一读，选出B栏中适合A栏的答语，将其标号写在A栏前的括号内。) | |
| A ( )1. What day is today? ( )2. Can you use a computer? ( )3. Whose jacket is it? ( )4. What can you do? ( )5. Are these gloves yours? ( )6. When do you have Art? | B A. I can play football. B. Yes, they're mine. C. Yes, I can. D. On Monday and Thursday. E. It's Wednesday. F. It's my father's. |