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一般来说,什么样的船方批注不可以接受?

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Where payment of the hire is to be made in cash,the Charterer is not considered to have paid unless what the Shipowner receives is().

A. the equivalent of cash or as good as cash
B. greater than the specified amount of cash
C. less than the specified amount of cash
D. anything that Charterer likes to offer

心理热线与聊天热线有本质的区别。

A. 正确
B. 错误

X.25建议的物理层可采用的标准是()。

A. RS-232-C
B. 21
C. 21bis
D. 以上都是

为什么电压型变频器需要专门设置制动电路?

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