溶血性链球菌感染的特点是()
A.易扩散、缺乏局限化倾向
B.脓液稀薄
C.易导致败血症
D.常有转移性脓肿
E.是蜂窝织炎、丹毒常见病菌
参考答案:A, B, C, E
You don’t have to pay for your flights ; they’re in the price of your holiday .
A.concluded
B.held
C.settled
D.included
两种金属组成的合金6.5g,与氯气完全反应,消耗氯气7.1g,则合金的组成可能是
A.Cu和Zn
B.Na和Ag
C.Fe和Ca
D.Cu和Ca