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【单选题】
干船坞结构整体式地板属于（）
A.
有限长梁
B.
无限长梁
C.
半无限长梁
D.
刚性梁
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举报参考答案：
举一反三
【单选题】To swim across the English Channel takes at least nine hours. It’s a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes, but it’s an expensive way to travel....
A.
not more expensive to be built than a bridge
B.
not more expensive to be built than a rail
C.
. cheaper to be built than a rail
D.
not cheaper to be built than a bridge
【单选题】地板刨平机和地板磨光机操作中应平缓，稳定，防止尘屑飞扬。连续工作（）h后，应停机检查电动机温度，若超过铭牌标定的标准，待冷却降温后再继续工作。电器和导线均不得有漏电现象。
A.
2～3
B.
2～4
C.
2～5
D.
2～6
相关题目：
【单选题】To swim across the English Channel takes at least nine hours. It’s a hard work and it makes you short of breath. To fly over the Channel takes only twenty minutes, but it’s an expensive way to travel....
A.
not more expensive to be built than a bridge
B.
not more expensive to be built than a rail
C.
. cheaper to be built than a rail
D.
not cheaper to be built than a bridge
【单选题】地板刨平机和地板磨光机操作中应平缓，稳定，防止尘屑飞扬。连续工作（）h后，应停机检查电动机温度，若超过铭牌标定的标准，待冷却降温后再继续工作。电器和导线均不得有漏电现象。
A.
2～3
B.
2～4
C.
2～5
D.
2～6
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