There is no vaccine to prevent dengue and no specific medicine to treat it, so the only defense is eradication of the mosquitoes that carry it and measures to protect people from mosquito bites. The small white animals with pink eyes are kept in a special isolated room so that they will not be exposed to any bacteria or germs that might infect them. They have been altered to be susceptible to human diseases. By infecting these humanized mice with strains of the dengue virus, investigators can study how the disease takes hold and what factors might cause the more serious and often deadly dengue hemorrhagic fever. Lab workers infect the mice artificially with the virus, keeping precise records of how much virus and what type of virus is used. But natural transmission of dengue by mosquitoes involves certain proteins the insects inject into the skin, something that Rico-Hesse says is missing when mice are artificially infected in the lab. Rico-Hesse and her colleagues are breeding mosquitoes in the laboratory to test various strains of the dengue virus transmitted to the mice by mosquitoes. 1.Which statement is correct according to Paragraph 1 B.Strong effect of certain medication can cure dengue fever. D.Scientists have invented a vaccine that can prevent dengue fever 解析:问题问的是:根据第一段,正确的是哪一项?第一段中提到,没有疫苗和药物能预防或治愈登革热,只有消灭所有携带病毒的蚊子才能防止被感染。由此可见,C选项正确 A.have red eyes. C.are put in the room with lots of mosquitoes. 正确答案:D 3.According to the report, the virus strains that cause the more severe dengue and hemorrhagic fever are actually B.from a special mosquito. D.killable with a specific genetic variant 解析:问题问的是:能够导致更加严重的登革热和出血热的病毒株实际上是什么?第六段最后一句中提到这两种病毒株其实是属于同一种基因变异体。因此选A。容易引起混淆的是D选项,其中提到了特殊变异体,只是该选项的意思是说病毒可以被病毒的特殊变异体杀死,显然不对。注意killable,是kill和able组成的合成词,意为可杀死的 A.Lab workers inject into the mice the fever virus with a syringe . C.The artificial infection of virus has exactly the same effect as the natural one. 正确答案:A 5.What is the authors attitude to the future of the researchers work B.Pessimistic. D.Sarcastic
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修8 unit 4《Pygmalion》(新人教版)
2017届高考英语一轮复习《全优课堂》核心语法项项破课件:专题4 动词的时态和语态(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修8 unit 1《A land of diversity》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修6 unit 1《Art》(新人教版)
2017届高考英语一轮复习《全优课堂》写作技能步步高课件:要决4 满分作文登场(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修1 unit 4《Earthquakes》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修7 unit 4《Sharing》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修6 unit 3《A healthy life》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修5 unit 1《Great Scientists》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修2 unit 1《Cultural relics》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修6 unit 5《The power of nature》(新人教版)
2017届高考英语一轮复习《全优课堂》核心语法项项破课件:专题9 情态动词和虚拟语气(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修4 unit 4《Body Language》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修3 unit 5《Canada
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修3 unit 1《Festivals around the world》(新人教版)
2017届高考英语一轮复习《全优课堂》写作技能步步高课件:要决3 高级句式添彩(新人教版)
2017届高考英语一轮复习《全优课堂》写作技能步步高课件:要决2 亮点词汇增色(新人教版)
2017届高考英语一轮复习《全优课堂》核心语法项项破课件:专题6 并列句和状语从句(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修4 unit 1《Women of achievement》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修7 unit 3《Under the sea》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修3 unit 3《The Million Pound Bank-Note》(新人教版)
2017届高考英语一轮复习《全优课堂》核心语法项项破课件:专题7 定语从句(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修6 unit 2《Poems》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修2 unit 3《Computers》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修5 unit 3《Life in the future》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修8 unit 3《Inventors and inventions》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修4 unit 2《Working the land》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:选修7 unit 5《Travelling abroad》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修1 unit 1《Friendship》(新人教版)
2017届高考英语一轮复习《全优课堂》模块知识总复习课件:必修2 unit 2《The Olympic Games》(新人教版)
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |