根据句意及汉语提示单词

1. How many _____(分钟) are there in an hour?

2. My school is about two _____(英里) from the train station.

3.  The old woman _____(依靠) on her daughter.

4. Don't _____(担心) about me. I’m OK now.

5.What about _____ (骑) a bike park?

增加建筑构件稳定性的方法有（）

A、增加截面尺寸

B、增加表面非燃性保护层

C、增加构件的耐火性能

D、减少有效荷载量值