备战高考阅读理解专项训练 (1) 含答案

2008-04-03 08:37:10   来源:转载   评论:0 点击:
    There were three main types of the influenza virus. The most important of these are type A and B, each of them having several subgroups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus in group A, but he did not know the subgroup. Then he reported the outbreak to the World Health Organization in Geneva. W.H.O. published the important news alongside reports of a similar outbreak in Hong Kong, where about 15-20% of the population had become ill.
    As soon as the London doctors received the package of throat samples, doctors began the standard tests. They found that by reproducing itself with very high speed, the virus had grown more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs against all the known sungroups of virus type A. none of them gave any protection. This, then, was something new, a new influenza virus, against which the people of the world had no help whatever.
    Having found the virus they were working with, the two doctors now dropped it into the noses of some specially selected animals, which get influenza much as human beings do. In a short time the usual signs of the disease appeared. These experiments proved that the new virus was easy to catch, but that it was not a killer. Scientists, like the general public, call it simply Asian flu.
上一页 1 2 3 4 5 6 7 8 9 10 11 下一页
         
相关链接
发表评论         最新评论内容          发表时间
精品课程
频道精选
联系我们: 英语周报 在线客服2
联系电话:[0351]6378222    E-mail:cs@ew.com.cn
英语学习网免责声明   英语学习网版权声明