甘草的功效是（）
A.补气健脾
B.补脾养心
C.补脾养肾
D.养心补肝
E.解毒，缓急
参考答案：E
— How well did you do in the maths exam?
— Better than before. I think it was _____ difficult than the last one. [ ]
A. more
B. less
C. much
D. very
下列选项属于车辆购置税的应税行为的是（）。
A、购买使用行为
B、进口使用行为
C、受赠使用行为
D、自产自用行为
