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问题 单项选择题

浅水效应大约和船底水深、船与浅滩或与另一艘船的间距（），而和本船的（）。

A、成反比速度平方成正比

B、成正比速度平方成正比

C、成反比速度成正比

D、成正比速度成正比

答案

参考答案：A

问答题

The ABC Bank Irrevocable documentary credit Number: LC123-258866 Date: August 24,1999 Date and place of expiry : October 30, 1999 China Advising bank: Bank of China Beneficiary: China XYZ import and export corp. Applicant: UVW corporation. Amount: USD52,500 (Say U.S Dollars fifty two thousand five hundred only) We hereby issue irrevocable documentary credit which is available with: Any bank By negotiation of beneficiary’s drafts at sight For full invoice value Drawn on the ABC bank Partial shipments: Not allowed Transshipment: Not allowed Shipment from: Shanghai To: Tokyo Japan At the latest: October 15, 1999 Following documents required: +Signed commercial invoice in three copies +Full set of clean on board ocean bill of lading +Weight certificate in two copies Covering: 100 metric tons (5PCT MOL) of XY chemical in drums at USD 500 per M/T. Special instructions: Insurance to be effected by buyer. Instructions to advising bank: Please advise this credit to the beneficiary We hereby undertake that drawers, endorsers in compliance with the terms of this credit will be duly honored upon presentation to the drawee bank. Authorized signature 一、根据上述信用证，回答下列问题

受益人
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单项选择题

下列不属于班级授课制优点的是( )。

A．有利于提高教学工作的效率

B．有利于发挥教师优势

C．有利于发挥班集体的教育作用

D．有利于充分发挥学生的主体性
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