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当前学科:基础营养学
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缺乏可导致低凝血酶原血症的是()
A . 维生素A
B . 维生素K
C . 维生素D
D . 维生素E
E . 维生素C
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脏病宜以()为主治疗。
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.
自汉朝“独尊儒术”后,孟子本应在孔子之后,享尽尊崇。但是孟子却一直得不到统治者的重视。汉武帝、唐太宗等几代盛世王朝的帝王都曾祭拜圣人孔子,孟子则如空气般被忽略掉了。这主要是因为孟子的思想()
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