根据句意、首字母和汉语提示填写单词或短语。

1. Did you n       the man in white shirt?

2. I'll m      to help you with your English.

3. Do you u       the Englishwoman's words?

4. She w       when she heard the terrble news.

5.                   （按照）her,he is a fool.

6. We                 （过去常常）watch the bullfighting（斗牛）.

7. The doctors                                     （习惯于研究）the cases.

8. It is very common for the smokers to                  （死于）the lung cancer.

直管段流体的流动阻力称为（）。

A、摩擦阻力

B、黏性阻力

C、局部阻力

D、沿程阻力