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题目:
单选题
A激发
B致敏
C预贮备介质
D新合成的介质
E以上均正确
答案:
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()按照消防设计文件编写施工方案,以指导施工安装,控制施工质量。
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你路上遇熟人,与他打招呼,结果对方“视而不见”,没有回应,你会()。
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型龙门铣床主轴轴承间隙调整时,调整环磨削量为需要减少的径向间隙的()倍。
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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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()is guaranteed by the full market supply and just-in-time logistics.
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结构施工图中,代号KJ表示()。
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设计科技活动方案的第一步是确立科技活动的目标。()
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中国银行业监督管理委员会领导金融业务。()
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《陕西省会计管理条例》规定,大中型企业和( )应当设置总会计师。