Which item belongs to the contraband on the plane for the carry-on baggage?

Which of the following pumps belongs to centrifugal pump?（）

A . Reciprocating pump B . Screw pump C . Diffuser pump D . Water-ring pum

Techniques for grouping items of vocabulary fall into three general categories: semantic fields, phonological sets and grammatical sets. Grouping items related by topics, for example, types of fruit, belongs to the semantic fields.（）

A . 正确 B . 错误

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Which three wireless service components belong to the operate phase？（）

A . operations plan B . operations assessment C . security administration D . system monitoring E . operations implementation F . incident management

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Which of the following items don’t belong to dock repair works?（）

A . making the repair list, booking spare parts and special tools for the dock repair B . shutting off all of the SW valves to outboard C . the sketches or diagrams used for the dock repair D . cleaning up the oil tank and boiler before enter the dock

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Which three of the protocols below belong to the application layer?（）

A . ARP B . HTTPS C . SMTP D . CDP E . TFTP F . ICMP

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Which of the following belongs to the communicative approach?

A . A. Focus on accuracy. B . B. Focus on fluency. C . C. Focus on strategies. D . D. Focus on comprehension.

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Which three service components belong to the operate phase（）

A . Change Management B . Operations Implementation C . System monitoring D . Incident Management E . Operations Assessment

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（）does not belong to the mooring trial item.

A . generator sets running trial B . shafting intensity trial C . the trail for pumps that working for ME D . ME safety devices trial