MG的发病机制可能为体内产生（），经由补体介导的细胞膜溶解作用使AChR大量破坏，导致突触后膜传递障碍而产生肌无力。
参考答案：AchR-Ab
---My little daughter is coughing worse than ever.
---She ______ to the hospital yesterday.
A．had to be taken
B．should have taken
C．must have been taken
D．ought to have been taken
按照《商业银行资本充足率管理办法》的规定，核心资本不包括( )。
A．少数股权 B．盈余公积C．资本公积 D．次级债务
