急性蜂窝织炎的致病菌为
A．溶血性链球菌B．厌氧性细菌C．两者均可D．两者均不可
参考答案：C
一个最多能装下1kg水的瓶子，它一定能盛下质量是1kg的（ ）（己知ρ盐水＞ρ水＞ρ植物油＞ρ酒精＞ρ汽油）
A．汽油
B．植物油
C．酒精
D．盐水
These are all good team sports and will help you ______ your strength and you will meet lots of people at
the same time. [ ]
A. grow up
B. give up
C. mix up
D. build up
