当圆柱的( )与( )相等时,侧面展开图是正方形。
底面周长;高
饭店的舒适程度取决于城市地段的地理位置。
-Do you mind my closing the window?
- _____. It's much too noisy outside.[ ]
A. Certainly I do
B. Of course not
C. All right
D. You’d better not