内伤所致疮疡常见的病因:()
A.风温、风热
B.湿热、火毒
C.火毒、热毒
D.外感热毒
E.脏腑虚弱
参考答案:E
—_______ do you like to fly, economy or first class?
—Economy, I think.
A.What
B.Where
C.Which
D.How
网上调查法有哪些优势。