喘证寒饮伏肺，复感外寒而引发者宜选用何方（）。
A.麻黄汤
B.小青龙汤
C.麻杏石甘汤
D.桑白皮汤
E.七味都气丸
参考答案：B
The girl glanced over her shoulder and found herself ______ by a young man in black. [ ]
A. was followed
B. followed
C. following
D. had been followed
通用示波器X放大器的作用是（）。
