用治邪热壅肺之咳喘、气急，宜选用的药组是（）
A.牛蒡子、苍耳子
B.细辛、辛夷
C.麻黄、石膏
D.生姜、紫苏
E.细辛、半夏
参考答案：C
若a＜0，ab＜0，则化简|b-a+3|-|a-b-9|的结果为______．
In Switzerland, people ________ visit a friend’s house. [ ]
A. make plans
B. make plans to
C. makes plans to
D. make a plan
