重症肌无力的主要临床特征为（）

A.全身骨骼肌均可无力

B.颅神经支配肌肉的无力多于脊神经支配的肌肉

C.受累骨骼肌的极易疲劳性和短时休息后好转

D.病情波动

E.感染后肌无力加重

— Mary’s got mad and has been sent to the mental hospital. Did you tell her boss about that?

— Yes, but I _____ her husband first.

A．should have told

B．shouldn’t have told

C．must have told

D．needn’t have told