风寒表证，咳嗽痰多又兼气滞胸闷，首选
A.生姜
B.防风
C.紫苏
D.荆芥
参考答案：C
Alice had a wonderful time yesterday, ______? [ ]
A. hadn't she
B. wasn't she
C. didn't she
D. wouldn't she
数字探伤仪与模拟仪器操作方式有哪些不同？
