若一个圆柱的侧面展开图是边长为2的正方形，则此圆柱的体积为.

搜题请搜索小程序“爱下问搜题”

问题填空题

若一个圆柱的侧面展开图是边长为2的正方形，则此圆柱的体积为 .

答案

题目分析：设圆柱的底面半径为，高为，底面积为，体积为，则有，故底面面积，故圆柱的体积.

阅读理解

读短文，判断正(T)误(F)。

I have a classmate, Mike Brown. He is an American. He is now in Beijing. His father and mother work

in Beijing, too. They are English teachers. Everyday his father takes him to school. He goes to school on his

father's bike. They like Chinese people and food. We are good friends.

( ) 1. Mike Brown is my friend.

( ) 2. His father and mother take Mike to school every day.

( ) 3. Mike goes to school on his bike.

( ) 4. Mike and I are in the same class.

( ) 5. Mike and his parents work in China.

问答题简答题

鳏寡不闻犬豕之食，茕独不见牛马之衣。（《洛阳伽蓝记？王子坊》）