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题目：
单选题
A含水硫酸钙
B含水硫酸钠
C硫酸铜
D二硫化铁
E碳酸钙
答案：
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按照李普曼的观点，传播媒介有选择地提示的“象征性现实”即（）。
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罪犯减刑假释“四榜公示”是什么？
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我国食管癌主要为（）
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用力吸气末()用力呼气末()开放性气胸时()
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某病人腹痛已5天，如果怀疑急性胰腺炎，最有诊断意义的指标是（）
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滑坡与崩塌有何区别？
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COMMERCIAL BANK OF THAT TOWN Date: Oct． 5, 2008 To: China National Cereals, Oils & Foodstuffs Corporation Beijing, China Advised through Bank of China, Beijing No． BOC08/10/05DOCUMENTARY LETTER OF CREDITDear Sirs, You are authorized to draw on China National Cereals, Oils &Foodstuffs Corporation for a sum not exceeding Can $120000(Say Canadian dollars one hundred and twenty thousand only)available by draft drawn on them at sight accompanied by the following documents: Full set of Clean On Board Bills of Lading made out to order and blank endorsed, marked "freight to collect" dated not later than November 30, 2008 and notify accountee． Signed Commercial Invoice in quintuplicate． Insurance Policies(or Certificates)in duplicate covering Marine and War Risks． Evidencing shipment from China port to Montreal, Canada of the following goods: 50000 tins of 430 grams of Great Wall Brand Strawberry Jam, at Can $2.50 per tin CFRC 3% Vancouver, details as per your S/C No． 08/8712． Partial shipments are not allowed． Transhipment is prohibited． This credit expires on November 30, 2008 for negotiation in China． ……合同条款 卖方：中国粮油食品公司(China National Cereals，Oils &Foodstuffs Corporation) 买方：温哥华香港食品公司(Hong Kong Food Company，Vancouver) 商品名称：长城牌草莓酱(Great Wall Brand Strawberry Jam) 规格：340克听装 数量：50000听 单价：CFR温哥华每听2.50加元，含佣金3% 总值：125000加元 装运期：2008年11月自中国港口运往温哥华，允许转船和分批装运。 付款条件：凭不可撤销的即期信用证付款。信用证议付有效期应为最后装运期后第15天在中国到期。
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在正常运行时，应不能打开层门（或多扇层门中的任意一扇），除非（）在该层门的开锁区域内停止或停站。
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深静脉血栓形成的最大危险性是（）
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脱水与代谢性酸中毒：患儿在扩容后仍有代谢性酸中毒，若用5%碳酸氢钠纠正，其总量按体重计算用多少为宜（）