1. In a roller coaster ride in which there are many cars, it is the middle car that gives you the fastest ride at the bottom of an incline. Why?
2. Why do the shades of desk lamps have holes in them at the top?
3. Blow onto your palm with a wide open mouth and then with your lips only slightly parted. The first feels hot, the other cold. Why?
4. Most tall buildings have revolving or double doors. Why?
这是老师出的四道题，英语水平有限，题目都还没看懂。
第二题，大概意思是： 为什么台灯的阴影顶部有个洞？
第四题，大概意思是： 为什么高楼都有旋转门和双扇门？
（和热力有关？）第一题和第三题还在翻译，
希望各位有空帮忙思索下，如果翻译有错误，有希望指正。
谢谢。
所以也无法回答
