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可能为人体内合成亚硝胺的重要场所的是（）
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不能接受牙周手术治疗的患者血小板计数低于（）
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《将进酒》主旨及修辞表现？
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足月妊娠临产，规律宫缩12小时，破膜14小时，羊水Ⅰ度污染，宫口开大5cm，S+1。若此时宫缩30秒，间隔5分钟，胎心监护出现频繁晚期减速，正确的处理是（）
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中国在闭关锁国的过程中对外开放的港口是（）
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George: Mr． Zhang． Thank you for your invitation of visiting your company． I hope we can materialize some deals with you soon． Zhang: Mr． George, we are pleased to have the opportunity to meet you here in our company． After you have seen the presentations in our show room, would you tell me which particular items are really of interest to you? George: I had studied your catalogue before I saw your presentations in the show room． We are interested in your silk dresses． I think there will be a prospective market for some of them in AmericA．Here is a list of our requirements, for which I hope to have your lowest offer, CIF New York． Zhang: Thank you for your inquiry． Could you please let us know the quantity you require so that we can make the offers? George: I'll do that． Meanwhile, would you give me an indicative price? Zhang: SurE．Here are our FOB price lists． All prices in the lists are subject to our final confirmation． You will find the prices are reasonable． George: What about the commission? Zhang: Usually, our principle does not allow any commission． George: From European suppliers, in the regular practice, we usually get a 3 to 5 percent commission for imports． You know, we do business on commission basis． Moreover, a commission will help us to promote sales． Zhang: Well, if the order is really large enough, we may take the commission into consideration． I think it will be better to consult this when you order the goods． George: OK． Then I will write down the quantity for each item on the enquiry list． Can you tell me when we can have your offer? Zhang: Tomorrow morning． Could we meet again tomorrow afternoon for further details? George: Fine．
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一般将储蓄随利率提高而增加的现象称为利率对储蓄的收入效应。（）
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全口义齿修复时，采用哥特式弓描记的目的是（）
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根据《行政复议法》的规定，()以上人民政府都有行政复议职权，都是行政复议机关。
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简述截止阀大盖泄漏的原因。