我国新疆降雨稀少的主要原因是(     )

根据句意及首字母提示完成单词

1. –How do you get to school?

  -I usually w____  but sometimes I take the bus.

2. -How long does it take?

  -It takes about 25 m____  .

3. Lin Fei's home is about 10 k____  from school, but my home is 3 miles from school.

4. He gets up at six o'clock every day, s____, and has a quick breakfast.

5. There is a b____ over the river.

已知：x+y=3,xy=1,试求：

珠穆朗玛峰海拔8844米，吐鲁番盆地海拔﹣155米，两地的相对高度是（　　）