句型转换。

1. These are eggs. (改为单数形式)

     ______ is ______ ______.

2. Can you see many bananas on the tree? (作否定回答) 

    No. ______ ______

3. Sandra likes carrots for breakfast. (对画线部分提问) 

    ______ ______  Sandra ______ for breakfast?

4. My parents have rice for lunch. (改为一般疑问句)

     ______ your parents ______ rice for lunch?

5. She likes salad and broccoli. (改为否定句) 

    She ______ like salad ______ broccoli.

推力轴承油槽内油的作用是（）。

A.散热

B.润滑

C.润滑和散热

D.绝缘传动