-
1988年由国家科技部制定，并经国务院批准颁发的“（）”是我国立法管理实验动物的第一部法规。
-
呼吸困难伴粉红色泡沫痰见于（）
-
关于夜航下列说法何者不正确（）.
-
根据液力偶合器的工作原理，液力偶合器内的能量传递属于（）。
-
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.
-
近代列强对中国进行经济掠夺的手段有（）。
-
选择硫化油的原则是什么？
-
百度公司董事长兼首席执行官的中国企业家李彦宏认为：技术创新是一个从量变到质变的过程；随着互联网的发展，大数据当前已走到技术变革的临界点。
-
下述心脏大血管的X线测量其正常值及意义哪项是错误的（）
-
现代市场有哪些主要功能？