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问题 多选题

如图所示，把一根均匀的米尺，在中点O支起，两端各挂四个和两个相同的钩码恰好使米尺平衡，按下列方式增减钩码或移动钩码，仍能保持米尺平衡的是[ ]

A．两边各加一个相同的钩码  

B．左边的钩码往左移一格，右边增加一个相同的钩码

C．左边减少两个钩码，右边减少一个钩码  

D．左边的钩码往右移一格，右边减少一个钩码

答案

BCD

单项选择题

患儿，5岁，右下乳磨牙面龋坏，未有自发痛和叩击痛，医生决定采用ART修复该牙，并告知患儿家长，患儿不能用该牙咀嚼的时间是修复后（）

A.半小时内

B.1小时内

C.5小时内

D.12小时内

E.24小时内
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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

装运港
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