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自洁式空气过滤器的作用是什么？
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恰如其分地表现商品，是体现一种（）。宣传商品要实事求是，包装费用要与产品价值相称。
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经鼻气管经鼻气管插管时，易发生折曲的部位是鼻前庭。()插管时，易发生折曲的部位是鼻前庭。()
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营销沟通差距管理的内容包括()。
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有一农村年轻妇女，婚后出现心悸2年，1个月前牙痛拔牙后，开始发热，全身乏力，检查，皮肤有出血点。脾大，心尖区可闻及双期杂音。本患者最大可能的疾病是（）。
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调速系统的试验主要有哪些项目？
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Scientists were embroiled (使卷入) last week in an international row over genetically modified cotton (GM cotton).A study in China suggested for the first time that the crop was permanently damaging the environment and that insects were building up resistance to it.The study, by the Nanjing institute of Environmental Science, combined the laboratory and field work from four Chinese scientific institutes. The study was done over a several - year period.GM Cotton had a gene resistance to the cotton bollworm (棉铃虫) and isolated from the bacterium (细菌) named Bacillus thuringiensis (Bt), but the study found that it harms the natural parasitic (寄生的) enemies of the cotton bollworm.It also indicated that populations of pests besides the bollworm had increased in Bt cotton fields and some had replaced the bollworm as the primary pest.However, the leading GM company, the US's Monsanto, which controls more than 80 per cent of the Bt cotton grown worldwide, dismissed the research.It said that the industry has always cited GM cotton as its biggest success, because it can increase yields by up to 60 per cent and reduce the need for pesticides (杀虫剂) by 80 per cent.But, unfortunately for the industry, (80) the scientists also found that the resistance of Bt cotton to bollworm decreased significantly over time.Why scientists say no to GM cotton?A．Because the cotton was genetically modified.B．Because the cotton was found to damage the environment.C．Because the cotton harms the bollworm.D．Because Monsanto dismissed the research.
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境内机构和个人向境外单笔支付等值（）以上（不含）服务贸易、收益、经常转移和资本项目外汇资金，应当按国家有关规定向主管税务机关申请办理《服务贸易、收益、经常转移和部分资本项目对外支付税务证明》。
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工资指导线（）主要适用于经济效益较差或亏损企业。（2011年11月二级真题）
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胸椎后突并成角畸形，常见于（）