有些细菌在一定条件下,能形成抵抗恶劣环境的休眠体叫( )
A.芽体
B.芽孢
C.孢子
D.合子
答案:B
—What are you going to do tomorrow?
—I’m not sure. I____ make a trip to Hanzhou with my girl friend. [ ]
A. may
B. maybe
C. will
D. must
OSPF NBMA网络类型要求网络中的路由器必须选择DR和BDR,否则无法工作