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【判断题】
起重机电动机的标准负荷持续率分为15%、25%、40%、100%四种。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】下列关于空心砌块砌体施工的说法错误的是（ ）。
A.
普通混凝土小型空心砌块砌体，不需要对其洒水湿润
B.
对轻骨料混凝土小型空心砌块，应提前浇水湿润
C.
小砌块表面有浮水时可以砌筑施工
D.
小砌块墙体应孔对孔、肋对肋错缝搭砌
【单选题】听力原文： Captain Joseph Mackey's airplane was flying over the ocean on its way to Great Britain when engine trouble started. He turned back and made a crash-landing at night in the deep snow of Newfoundl...
A.
No fuel.
B.
Ice on the wing.
C.
Engine trouble.
D.
No food.
【简答题】全手握笔,自发乱画____ 29.E
【单选题】Mike ______ with the captain to abandon the ship before it was too late.
A.
claimed
B.
pleaded
C.
appealed
D.
begged
【单选题】听力原文： Captain Joseph Mackey's airplane was flying over the ocean on its way to Great Britain when engine trouble started. He turned back and made a crash-landing at night in the deep snow of Newfoundl...
A.
No fuel.
B.
Ice on the wing.
C.
Engine trouble.
D.
No food.
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