产后病治疗原则是（）
A.补气养血为主
B.勿拘于产后，勿忘于产后
C.活血化瘀为主
D.疏肝健脾为主
E.滋补肝肾为主
参考答案：B
I apologize if I _______ you, but I assure you that it was unintentional.
A．should offend
B．were to offend
C．had offended
D．offended
什么是平面汇交力系？平面汇交力系平衡的条件？
