临床上哪一种药物引起黄褐斑最常见（）
A.避孕药
B.苯妥英钠
C.氯丙嗪
D.强的松
E.双氢克尿噻
参考答案：A
My brother was against my suggestion while my sister was ____ it. [ ]
A. in honor of
B. in search of
C. in favor of
D. in charge of
在铰链四杆机构中，若两连架杆之一为曲柄，另一为摇杆，则该机构为（）
A.曲柄摇杆机构
B.双曲柄机构
C.双摇杆机构
D.偏心轮机构
