我国科技园区高新技术产业主要分布在（　　）

地球是一个　____ 的球体，它的平均半径是____ 　千米．

根据句意及首字母提示完成句子

1. Thirty m____ is half an hour.

2. One k____  is 1000 meters（米）.

3. Mary wants to buy a n____computer. Her old one is broken(坏的).

4. He gets up early e____ morning.

5. -How do you get to work, Emma?

  -I get to work b____ bike.