《景岳全书·厥逆》总结前代对厥证的认识，提出以虚实论治厥证的医家是( )
A．李中梓B．张子和C．张景岳D．朱丹溪
参考答案：C
— Must I go to the gym three times a week?
— No, you _____. Twice a week is OK. [ ]
A. mustn't
B. needn't
C. can't
D. shouldn't
据国外学者研究表明，大多数的死亡婴儿生于社会经济地位较（）的家庭。
