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在直流电路中，把电流流出的一端叫电源的正极。（）
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for, too high, meet, meet with, disappointed, at, onDear Sir or Madam, Thank you(1)your mail．We are(2)to hear that our price for your required product is(3)for your acceptance．You mentioned that Japanese goods are being offered to you(4)a price approximately 8% lower than our quotation. We accept your position, but we are of the opinion that the quality of the other makes does not measure up to that of our products．Although we are keen to do business with you, we regret that we cannot accept your counter offer. We do want to try and work with you, and meet your request, but the best we can do is to reduce our previous quotation by 3%．We hope that this will(5)your approval. We look forward to hearing from you. With best regards,
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参与免疫应答的是哪种细胞
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学生对知识的内在加工过程包括（ ）。
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党的过渡时期总路线的基本内容是什么？
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某评估公司承接某国有煤矿企业改制的评估业务，需评估一风井用地的价格。经实地调查，该风井所处区域有供水管网，但风井未接入供水；风井用电由企业投资自宗地外5km处的变电所接人,并由企业投资修建一条2km长的道路与区域干道相连，无其他设施。据此，在进行土地价格定义时，土地开发程度应设定为（）。
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《瘗鹤铭》
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下列哪个保险公司的成立打破了我国一家公司独家垄断经营保险业务的局面？（）
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外周血血小板明显减少，骨髓巨核细胞增多。见于（）。
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简述物种保护的重要意义。