流体在单位时间流经单位管道截面积的体积流量称为流体的()。
A.质量流速
B.线速度
C.最大流速
D.最小流速
参考答案:B
请将下列句子改为同义句,每空一词。
1. It's time for lunch.
It's time lunch.
2. I had a great time in Beijing.
I in Beijing.
3. We would like to buy some food.
We buy some food.
4. Beijing is not near our city.
Beijing is our city.
5. The student likes to walk to school.
The student likes to go to school .
6. My father bought me a computer yesterday.
My father bought a me yesterday.
7. Let's show the way to you.
Let's show the .
8. I'm very tired and can't walk home.
I'm tired walk home.
9. A plane is faster than a train.
A train is than a .
10. I want to send a letter to her.
I want to send letter.
被称为“现代经济学之父”,著有《国富论》的是亚当·斯密()
A、正确
B、错误