三棱针法的主要作用是（）
A.行气活血
B.温经通络
C.消肿止痛
D.开窍醒神
E.清热泻火
参考答案：A, C, D, E
旅行社投保旅行社责任保险采取年度投保和团队投保相结合的方式。（）
—______ have you been away from your hometown, Janet?
—Since 5 years ago. [ ]
A. How many
B. How long
C. How much
D. How often
