如图是黄冈日报刊登的《“拾金”不昧》的漫画．

（1）此漫画中包含一些物理知识，请你说出其中二点：

①______；

②______．

（2）从物理学角度说说这种不文明行为的危害：______

按要求改写句子。

1. Mike has breakfast at six in the moming. (改为否定句) 

    Mike ____ ____ breakfast at six in the morning.

2. There's some milk in the glass. (改为一般疑问句) 

    ____ there ____ milk in the glass?

3. She helps her mother do the housework. (改为同义句) 

    She ____ her mother ____ the housework.

4. We can see five glasses of water on the table. (对画线部分提问)

    ____ ____ glasses of water can you see on the table?

5. I think I can mend it. (改为否定句)

    I ____ think I can mend it.

6. Lin Tao often helps me with my Chinese. (对画线部分提问) 

    ____   ____   ____  Lin Tao ____ you with your Chinese?