关于地球自转速度，叙述正确的是（     ）

A．纬度越高，线速度越小，角速度越大

B．赤道上的线速度、角速度最大

C．南北极点既无线速度也无角速度

D．地球上各处的线速度和角速度都一样

单词拼写。

1. There are many _____ (国家) in the world.

2. Where do you want to go on _____.(假期)

3. We e _____ (欣赏) the city's quiet streets and clean park every day.

4. Let's c _____ (打扫) our room. It's dirty.

5. Is she s _____ (购物) at the mall now?

6. The pay phone is n _____ to the library .

7. Can you tell _____ (we) the right answer to this question?

8. Are you _____ (make) a kite for me?

9. He usually sleeps and r _____ 20 hours every day.  

10. Thank you for j _____ the TV show.