胁是指以下什么部位()
A.胸部
B.上腹部
C.右上腹部
D.左上腹部
E.侧胸部
参考答案:E
I also told them if they wanted a copy of my book ____ my office. I would be happy to send one to them.[ ]
A. to call
B. call
C. calling
D. called
离心式与轴流式通风机的启动方法有什么不同?为什么?