下列细菌中属于条件致病菌的是()
A.痢疾志贺菌
B.伤寒沙门菌
C.绿脓杆菌
D.乙型溶血性链球菌
E.霍乱弧菌
参考答案:C
He stood up angrily and ___ in strong language when they stated their views.
A.objected
B.announced
C.declared
D.said
给水管网应根据具体情况设置分段和分区检修的阀门,管网上的阀门间距,不应超过( )个消火栓的布置长度。
A.4 B.5 C.6 D.7