《环境空气质量标准》（修改版）中，NO2的二级标准的日平均浓度限值是（）mg/m3。
A.0.24
B.0.20
C.0.12
D.0.50
参考答案：C
Mom is coming. What present ________ for your birthday?
A．do you expect has she got
B．do you expect she has got
C．you expect she has got
D．you expect has she got
下列哪项不是细辛的功效（）
A.祛风散寒
B.通窍
C.止痛
D.温中止呕
E.温肺化饮
