五味子不具有的功效是（）
A.敛肺止咳平喘
B.温中行气止痛
C.滋肾涩精止泻
D.固表收敛止汗
E.生津宁心安神
参考答案：B
32. Tens of thousands of trees _____ in the area in the past few years.
A．have been planted
B．were planted
C．have planted
D．had planted
“志愿服务”的意义和作用是什么？
