桂枝加桂汤中“更加桂枝二两”的作用是（）。
A.解肌祛风
B.调和营卫
C.平冲降逆
D.发汗解表
E.温通心阳
参考答案：C, E
-How many students are there in your school?
-_______ students, I think.[ ]
A.Thousand of
B.Three thousands
C.Three thousand
D.Three thousands of
经济人口容量
