下图是鞭毛的结构示意图，图B可能是哪一种微生物的鞭毛结构（）
A.大肠杆菌
B.枯草芽孢杆菌
C. 四联球菌
D. 酵母菌
参考答案：B
Speaker A: I wonder what's happened to Jerry. He hasn't been around for at least two weeks.Speaker B: ______
A．Yes, two weeks halve passed before you know where you are.
B．Jerry is quite introvert. He doesn't like to let others know much about him.
C．Do you know the reason for his absence
D．He took a leave to see his mother in Europe.
岳麓书院是湖湘文化的发源地，它位于[ ]
A、长沙市
B、岳阳市
C、湘潭市
D、武汉市
