复元活血汤原方中用量最大的药物是()
A.大黄
B.柴胡
C.当归
D.红花
E.桃仁
参考答案:A
--- How long ____ in Beijing? --- For just the weekend. I’ll be back for work next Monday morning.
A.have you stayed
B.are you staying
C.did you stay
D.do you stay
将0. 03molCl2缓缓通入含0.02mol H2SO3和0.02molHBr的混合溶液中,在此过程中溶液的c(H+)与Cl2用量的关系示意图是(溶液的体积视为不变)[ ]
A.
B.
C.
D.