()和()同属中医尾闾窦道。
参考答案:骶尾部畸胎瘤;骶尾部藏毛窦
If you want to keep _____, you must exercise every day. [ ]
A. health
B. in good health
C. fat
D. fit
发电机不能启动,其电瓶连接处产生电火花,应如何处理?()
A.紧固电瓶连接线
B.更换火花塞
C.更换启动马达
D.更换机油