闭经的原因是( )
A．寒凝血瘀
B．气滞血瘀
C．痰湿阻滞胞宫
D．气虚血亏
参考答案：A,B,C,D
参与旁路途径的补体固有成分包括______、______、______和C5～C9。
A warehouse had a square floor with area 10,000 square meters. A rectangular addition was built along one entire side of the warehouse that increased the floor area by on-half as much as the original floor are-a. How many meters did the addition extend beyond the original building ？（）
A．10
B．20
C．50
D．200
E．500
