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男,39岁。3d前感右耳后疼痛,今晨起洗漱时发现右口角漏水,右眼不能闭合。体检:右外耳道见少量小水疱及卡他性分泌物,右侧额纹消失,试图闭眼时右眼闭合不全,有Bell现象,右侧鼻唇沟浅,示齿时口角向左歪斜。右舌前2/3味觉缺失,右乳突处压痛。其病因是()
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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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简述各公司公布船期表存在差异的原因
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胚胎期造血首先出现在()
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同性恋是指性成熟期个体在性爱、心理、情感以及社交兴趣上,主要对象均为同性别的人,也即对性伴选择时存在明显的或强烈的指向同一性别的人或同时存在同性性行为。
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婴幼儿肺炎给氧的指征是()
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斜刺xié cì
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纯策略纳什均衡和混合策略纳什均衡都不一定存在。()
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蒸、煮对()有部分水解作用,对脂肪影响不大,但会使水溶性维生素溶于水中。
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消灭霍乱的传染源很难,因为()