配伍中寓有"辛开苦降"之意的方剂是（）
A.半夏泻心汤
B.桂枝汤
C.芍药汤
D.泻白散
E.蒿芩清胆汤
参考答案：A
计算2lg2+lg0.25=______．
I am _____ about what I say because careless remarks are likely to hurt others' feelings．
A．enthusiastic
B．concerned
C．doubtful
D．cautious
