脑膜炎奈瑟菌的致病因素有（）
A.内毒素
B.荚膜
C.外膜蛋白（OMP）
D.菌毛
E.神经毒素
参考答案：A, B, C, D
---Would you please tell us something about the Group of Eight(G8)?
---Well, G8 is an international organization________the richest countries in the world, five of which are quite small and two of which are island states.
A．is consisted of
B．consisting of
C．consists of
D．consisted of
抑郁性障碍可能导致的最严重后果是（）
A.意志丧失
B.木僵
C.症状躯体化
D.自杀
E.思维破裂
