下列哪几项是桂枝所具有的药理作用
A．发汗
B．解热
C．扩张皮肤血管
D．抗菌
E．强心
参考答案：A,B,C,D,E
青春期的年龄是指（ ）
A．6、7岁-11
B．10、12岁-20岁
C．18-25岁
D．25-35岁
One of the objectives by the Natural Approach is to enable the students to make the meaning clear but not necessarily be ______ in all details of grammar.
A．correct
B．accurate
C．brief
D．concise
