用所给单词的适当形式填空。

1. It's three thirty. Please stop _______ (work) and have a relax.

2. I'm _______ (stress) out because my English isn't improving.

3. It is snowing ________ (heavy) outside. Let's stay at home.

4. All the ________ (sing) are from Singapore.

5. What are the ________ (different) between the movies and the TV plays?

（6分）一根长为L的丝线吊着一质量为m的带电量为q的小球静止在水平向右的匀强电场中，如图所示,丝线与竖直方向成37^o角，（重力加速度为g），求:

(1)该静止小球带何种电；   

(2)匀强电场的电场强度的大小；