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题目：
单选题
A氯乙烯、氯甲醚、砷、铬酸盐
B氯甲醚、砷、铬酸盐、联苯胺
C联苯胺、氯甲醚、砷、苯
D砷、焦炉逸散物、石棉、苯
E氯甲醚、砷、焦炉逸散物、石棉
答案：
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铣削铸铁的碳化物刀片宜采用（）。
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胎盘能分泌大量的孕激素与雌激素。
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管理是在组织中，有关人员对各种资源进行适当（ ）组织和安排，以完成预定的目标和任务.
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食物中毒的特征有（）
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简述理论联系实际原则的内容。
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对早期诊断AMI最灵敏的指标是（）
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关于自动倾斜器说法错误的是（）
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下列哪一吸入麻药与肾上腺素合用时易增加心肌应激性( )
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某区段货物列车重量标准为4000t，列车长度标准为70•0，现该区段某一区段列车实际重量为1218t，计长69.6，则该列车为（）。
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A: I've come about your offer for bristles. B: We have the offer ready for you． Let me see..． Here it is． 100 cases of Tsingtao Bristles, 57mm, at..． pounds sterling per kilogram, CIF European Main Ports, for shipment in June, 2009． The offer is valid for three days. A: Why, your price has soared．It's almost 25 % higher than last year's． It would be impossible for us to push any sales at such a price. B: I'm a little surprised to hear you say that． You know very well that market for bristles has gone up a great deal in recent months． The price we offer compares favourably with quotations you can get elsewhere. A: I'm afraid I can't agree with you there． I must point out that your price is higher than some of the quotations we have received from other sources. B: But you must take the quality into consideration． Everyone in the trade knows that China's bristles are of superior quality to those from other countries. A: I agree that yours are of better quality． But there's competition from synthetic products, too． You can't ignore that prices for synthetic bristles haven't changed much over the years. B: There's practically no substitute for bristles for certain uses． That's why demand for natural bristles keeps rising in spite of cheaper synthetic ones． To be frank with you, if it were not for the long-standing relationship between us, we would hardly be willing to make you a firm offer at this price. A: Well, we'll have a lot of difficulties in persuading our clients to buy at this price． But I'll have to try, I suppose.