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当前学科：壁纸中有害物质
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《室内装饰装修材料壁纸中有害物质限量》（GB18585--2001）中规定，测定甲醛时将壁纸试样悬挂于装有23℃蒸馏水的密封容器中，经过24h，测定蒸馏水中的甲醛含量。
A . 正确
B . 错误
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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.
杨升庵祠及桂湖
（）材料是指能在较大程度上吸收由空气传递的声波能量的材料。
56岁男性患者，4天前车祸致失血性休克，近3天来每日尿量150～250ml，全身浮肿，气促不能平卧，呼吸26次／min，血压160／95mmHg，双肺可闻湿性啰音，心率126次／min，血钠130mmol／L，血肌酐658μmol／L。本例少尿的原因最不可能的是（）。