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【单选题】
关于消防应急照明和疏散指示系统的供电要求,叙述不正确是( )。
A.
当建筑物消防用电负荷为一级,且采用交流电源供电时,电源和应急电源提供双电源
B.
当建筑物消防用电负荷为一级,不应采用树干式供电方式
C.
当消防用电负荷为二级并采用交流电源供电时,宜采用线路树干式供电
D.
应急照明配电箱应按防火分区设置
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参考答案:
举一反三
【单选题】— I thought you were proud of the coat I ________. — I'm afraid not. You'd better change it for another. [ ]
A.
would wear
B.
had worn
C.
wore
D.
wear
查看完整题目与答案
【单选题】最先发现肺炎链球菌转化现象的科学家是
A.
Griffith
B.
Avery
C.
Luria
D.
Lederberg
E.
Delbruck
查看完整题目与答案
【单选题】听力原文:M: If you're not too busy tonight, how about catching a movie? W: I thought you had to work on that big presentation you are making in front of the board members tomorrow. Have you already prepar...
A.
Today.
B.
Tomorrow.
C.
This Friday.
D.
Next week.
查看完整题目与答案
【单选题】用大齿轮带动小齿轮,可以使转动速度( )
A.
变快
B.
变慢
C.
不变
查看完整题目与答案
【单选题】I thought you 1ike somethjngto read , so I have brought you some books .
A.
. may
B.
. might
C.
. could
D.
. must
查看完整题目与答案
【单选题】—Did you take enough money with you? —No, I needed ______ I thought I would.
A.
not so much as
B.
as much as
C.
much more than
D.
much less than
查看完整题目与答案
【单选题】最先发现肺炎链球菌转化现象的科学家是()。
A.
Griffith
B.
Avery
C.
Luria
D.
Lederberg
查看完整题目与答案
【单选题】大齿轮带动小齿轮,小齿轮转得速度()
A.
快
B.
慢
C.
不变
D.
不知道
查看完整题目与答案
【判断题】大齿轮带动小齿轮转动,小齿轮速度快。
A.
正确
B.
错误
查看完整题目与答案
【单选题】I had never expected you to turn _______ at the meeting. I thought you were in Shanghai。
A.
around
B.
on
C.
in
D.
up
查看完整题目与答案
相关题目:
【单选题】— I thought you were proud of the coat I ________. — I'm afraid not. You'd better change it for another. [ ]
A.
would wear
B.
had worn
C.
wore
D.
wear
查看完整题目与答案
【单选题】最先发现肺炎链球菌转化现象的科学家是
A.
Griffith
B.
Avery
C.
Luria
D.
Lederberg
E.
Delbruck
查看完整题目与答案
【单选题】听力原文:M: If you're not too busy tonight, how about catching a movie? W: I thought you had to work on that big presentation you are making in front of the board members tomorrow. Have you already prepar...
A.
Today.
B.
Tomorrow.
C.
This Friday.
D.
Next week.
查看完整题目与答案
【单选题】用大齿轮带动小齿轮,可以使转动速度( )
A.
变快
B.
变慢
C.
不变
查看完整题目与答案
【单选题】I thought you 1ike somethjngto read , so I have brought you some books .
A.
. may
B.
. might
C.
. could
D.
. must
查看完整题目与答案
【单选题】—Did you take enough money with you? —No, I needed ______ I thought I would.
A.
not so much as
B.
as much as
C.
much more than
D.
much less than
查看完整题目与答案
【单选题】最先发现肺炎链球菌转化现象的科学家是()。
A.
Griffith
B.
Avery
C.
Luria
D.
Lederberg
查看完整题目与答案
【单选题】大齿轮带动小齿轮,小齿轮转得速度()
A.
快
B.
慢
C.
不变
D.
不知道
查看完整题目与答案
【判断题】大齿轮带动小齿轮转动,小齿轮速度快。
A.
正确
B.
错误
查看完整题目与答案
【单选题】I had never expected you to turn _______ at the meeting. I thought you were in Shanghai。
A.
around
B.
on
C.
in
D.
up
查看完整题目与答案
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