题目内容

分拣工作的主要任务是()。

A. 为收寄服务、为登记把关
B. 为营业服务、为出口把关
C. 为出口服务、为进口把关
D. 为登记服务、为收寄把关

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Which system has the least effective radius of operation？

A. HF SITOR
B. MF NBDP
C. VHF DSC
D. NATTEX

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GMDSS-equipped ships will be required to perform which of the following communications functions？

A. Distress alerting and maritime safety information
B. Search and Rescue coordination and on-scene communications
C. Bridge-to-bridge and general radio communications
D. All of these

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What is the term which refers to the supply of electrical energy required to supply radio

A. Emergency power
B. Reserve source of energy
C. Ship’s emergency diesel generator
D. Ship’s standby generator

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Which equation shows right ratio between the frequency (f) and the wavelength (Lambda) of radio waves？

A. f=Lambda/C
B. f=C x Lambda
C. f=C/Lambda
D. f=C x 6.28 x Lambda

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分拣工作的主要任务是()。

A. 为收寄服务、为登记把关 B. 为营业服务、为出口把关 C. 为出口服务、为进口把关 D. 为登记服务、为收寄把关

Which system has the least effective radius of operation？

GMDSS-equipped ships will be required to perform which of the following communications functions？

What is the term which refers to the supply of electrical energy required to supply radio

Which equation shows right ratio between the frequency (f) and the wavelength (Lambda) of radio waves？

A. 为收寄服务、为登记把关
B. 为营业服务、为出口把关
C. 为出口服务、为进口把关
D. 为登记服务、为收寄把关