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【单选题】
交流接触器的线圈可以接在直流电源上吗?A.
不确定
B.
不可以
C.
可以
D.
以上都不对
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】Responsibility for family is ________ happiness exists when you think of your parents and children.
A.
which
B.
what
C.
where
D.
whether
【简答题】Though your parents probably meant to have your name last a lifetime, remember that when they picked it they’d hardly met you, and the hopes and dreams they cared for when they chose it may not match ...
【简答题】When your parents advise you to “get an education” in order to raise your income, they tell you only half the truth. What they really mean is to get just enough education to provide manpower（人力资源） for...
【单选题】When was it _____ your parents took you to Hangzhou?
A.
before
B.
if
C.
which
D.
that
【单选题】. When your parents haven’t ____your letter for a long time,they will worry about you.
A.
heard
B.
heard from
C.
received
D.
accepted
【单选题】关于大体积混凝土浇筑减少水化热问题说法错误的是( )
A.
浇筑混凝土时可以在混凝土内预埋散热管
B.
混凝土浇筑时为了减小内外温差，可以在混凝土周围用棉被或草席包裹
C.
降低混凝土入模温度
D.
减少浇筑层厚度，加速砼浇筑速度
【多选题】关于大体积混凝土浇筑减少水化热问题说法正确的是( )。
A.
浇筑混凝土时可以在混凝土内预埋散热管
B.
混凝土浇筑时为了减小内外温差,可以在混凝土周围用棉被或草席包裹
C.
降低混凝土入模温度
D.
减少浇筑层厚度,加速砼浇筑速度
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