用压强计研究液体内部的压强：

（1）带有橡皮膜的小盒放入液体内部时，压强计U形管两边液面产生高度差，这说明______；

（2）小盒放入液体内部越深，则两边液面的高度差越______，这说明______；

（3）当小盒在同一深度向不同方向转动时，两管液面的高度差______，这说明______．

句型转换(每空一词)

1. Midori was a famous pianist.(对画线部分提问)

                         Midori?

2. Nancy spent about an hour finishing her schoolwork.(改为同义句)

It            Nancy about an hour           finish her schoolwork.

3. He hiccupped for 10 years and 3 months.(对画线部分提问)

                        did he hiccup?

4. I learned to cook when l was ten years old.(改为同义句)

I learned to cook at the                        ten.

5. He met his old friends on his way to school. (改为一般疑问句)

           he            his old friends on his way to school?