按要求改写下列句子。

1. She often swims with her friends at pool. (用now改写)

    She ______ ______ with her friends at the pool.

2. You can't talk loudly in the library. (改为祈使句)

     ______ ______ loudly in the library.

3. Does she have any color pencils? (改为肯定句) 　　

    She ______ ______ color Pencils.

4. I have a new house. It has two bedrooms. (合并为一句)

     I have a house ______ two bedrooms.

5. It's very kind of you. (改为感叹句)

    ______ ______ you are!

对于低阻力输送管路，机泵串联优于并联。