造成损伤的物理性因素有（）
A、冷冻
B、灼烫
C、电流
D、声波
E、激光
参考答案：A, B, C, D, E
—How about going out for a picnic on Sunday morning?
—Hmm．___．The weather is very good these days．
A．Yes, why not
B．Well, no way
C．Oh, never mind
D．Sure, no matter
简述园长的角色
