规定人们依法有权作出某种行为的法律规范属于（）
A、任意性规范
B、指导性规范
C、命令性规范
D、禁止性规范
参考答案：A
(妊娠)子痫宜选用：
A．地西泮
B．口服硫酸镁
C．注射硫酸镁
D．水合氯醛
E．苯巴比妥钠
—Nobody knows _____ he was after he graduated from Beijing University.
—But I was once told he was a doctor working in a far-away village. [ ]
A. what
B. who
C. where
D. how
