胁痛肝胆湿热证治疗首选方剂应为（）。
A.葛根芩连汤
B.柴胡疏肝散
C.龙胆泻肝汤
D.一贯煎
E.复元活血汤
参考答案：C
已知全集U={1，2，3，4，5，6}，集合M={2，3，5}，N={4，5}，则CU（M∪N）等于 [ ]
A．{1，3，5}
B．{2，4，6}
C．{1，5}
D．{1，6}
His daughter is a famous singer, _____ always makes him very proud. [ ]
A. that
B. which
C. who
D. what
