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【简答题】
混凝土配合比设计时，其骨料是以什么含水状态为基准的?砂子的含水量对其对本身及混凝土有什么影响?
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反馈参考答案：
举一反三
【单选题】The passage suggests that we should now re-examine our thinking about work and______.
A.
be prepared to fill in time by taking up housework
B.
set up smaller private enterprises so that we in turn cab employ others
C.
create more factories in order to increase our productivity
D.
be prepared to admit that being employed is not the only kind of work
【多选题】保安自动化系统主要包括( )紧急报警系统和周界防卫系统等。
A.
防盗报警与监控系统
B.
出/入口监控系统
C.
闭路电视传输系统
D.
巡更管理系统
E.
智能建筑集成系统
【单选题】The passage suggests that we should now re-examine our thinking about work and ______.
A.
be prepared to fill in time by taking up housework
B.
set up smaller private enterprises so that we in turn can employ others
C.
create more factories in order to increase our productivity
D.
be prepared to admit that being employed is not the only kind of work
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