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问题 单项选择题

旅客购买前往边境地区车票时，出示（）不符合国务院铁路主管部门、公安部门规定证明。

A.边境居民证

B.边境往返乘车书面证明

C.边境居民身份证

D.边境通行证

答案

参考答案：B

问答题

Ari is a metal broker who was in negotiations with three parties for the sale of a large consignment of copper he was expecting to receive on 15 March.On 1 March he wrote to the three clients Bas, Cas and Das.He wrote to Bas offering to supply the copper at $6,000 per tonne for orders over 100 tonnes for delivery to be made before 1 May. Bas immediately wrote back ordering 75 tonnes for delivery on 30 April.He wrote to Cas offering 100 tonnes of copper at $6,500 per tonne if he placed an order before 1 May. Cas also immediately wrote back ordering 150 tonnes at the agreed price for delivery on 30 April.He wrote to Das offering to supply him copper at $6,750 per tonne and Das immediately wrote back ordering 150 tonnes for delivery on 1 May.After he had sent the above letters and before he received the replies Ari discovered that he would not be able to secure the delivery of the copper.Required:Advise Ari as to his potential liability to Bas, Cas and Das under the above situations, assuming that the United Nations Convention on Contracts for the International Sale of Goods applies. (10 marks)
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单项选择题

女，45岁。四肢无力，站立不稳，进行性加重半年，无外伤史。查体：双下肢肌张力高，反射亢进。Hoffmann征(+)，Babinski征(+)。

应首先选择的治疗方法是

A．理疗

B．手术治疗

C．推拿按摩

D．颏枕带牵引

E．带围领和颈托
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