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问题 判断题

外贸经营和收用货单位办理《实施安全质量许可制度的进口商品目录》内商品进口手续前，应同时向国外厂商或者代理人申请办理并获得进口安全质量许可后，才能签定进口贸易合同( )

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参考答案：对

单项选择题

The Internet is a (66) network of networks which interconnects (67) ranging from the simplest personal computers to the most sophisticated mainframes and supercomputers. This network of networks is used for an extraordinary range of purposes long distance collaborations, retrieving free software and documents, (68) library catalogs, (69) in to supercomputers - the list of current Internet activities and (70) is large and the range of possible future applications is as unlimited as our imagination.

A．database

B．gateway

C．router

D．computers
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问答题 论述题

皮带输送机启动前应检查哪些内容？
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