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赡养、抚养或者扶养按哪种标准计算？

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井下瓦斯抽放钻场瓦斯浓度每（）天检查一次。

A. 四
B. 三
C. 二

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以硬连线方式构成的控制器也称为（）。

A. 组合逻辑型控制器
B. 微程序控制器
C. 存储逻辑型控制器
D. 运算器

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With reference to a radial piston pump, which one of the following statements is false?（）

A. Surrounding the fixed shaft is a hollow shaft
B. This hollow shaft carries radial bores
C. Each bore is fitted with a well-lapped plunger
D. There are always even numbers of bore

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In the event of a casualty to a ship，who is responsible to make records available to the Coast Guard official authorized to investigate the casualty?（）

A. Officer in Charge，Marine Inspection
B. The person who caused the casualty
C. The company man
D. The owner

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