题目

如图，圆柱的底面直径和高均为4，动点P从A点出发，沿着圆柱的侧面移动到BC的中点S的最短距离是 ( ) A . B . C . D . 答案：A7、Our teacher told us that the sun  ________ bigger than the earth. A．was       B．is                 C．are