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美国白宫有几层?

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While your vessel is docked port side to a wharf,a sudden gale force wind causes the vessel’s stern lines to part. The stern begins to fall away from the dock,and no tugs are immediately available. Which measure(s) should you take FIRST?()

A. Notify the engineroom of the need for propulsion
B. Shut down any cargo transfer that's in progress
C. Let go the port anchor and veer to a short scope of chain
D. Obtain assistance from the terminal to put new stern lines out

在南立面图中能反映长宽高中的()

A. 长和高
B. 长和宽
C. 高和宽
D. 长宽高

哺乳母兔日喂饲料量多少合适?

电务段、机务段对LKJ的直接运行记录数据及其格式处理文件须建立数据库保存,保存时间不得少于2个月。

A. 正确
B. 错误

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