霍乱弧菌最重要的致病物质是
A．菌毛
B．鞭毛
C．霍乱肠毒素
D．内毒素
E．荚膜
参考答案：C
I told your friend how to get to the hotel， but I perhaps I __________ have driven her there.
A．could
B．must
C．might
D．should
什么是综合测井图？用来解决什么问题？
