2. 外语
  3. Man has invented a variety of weapons. The 20th century saw the creation of great weapons, based on the principles of nuclear ph

Man has invented a variety of weapons. The 20th century saw the creation of great weapons, based on the principles of nuclear ph

admin2009-04-23  106
问题     Man has invented a variety of weapons. The 20th century saw the creation of great weapons, based on the principles of nuclear physics. The 21st century will see great weapons based on the knowledge of DNA and the genetic code. During the 1980s, the Soviet Union used genetic engineering to create incurable strains(种类) of Black Death that were resistant to drugs. This biotechnology Black Death was loaded into missile warheads(弹头) aimed at the U.S. As biotechnology becomes more supple(灵活的) and powerful and as the genetic code of more organisms is discovered, biologists will learn how to mix genes of different bugs to create deadly, unnatural strains that can be turned into deadly, effective weapons.
    Scientists have found a type of bacterium that is virtually indestructible. It’s called "terrible berry that survives radiation". This bug can live in a blast of gamma rays that is the equivalent of thousands of deadly human doses radiation which is strong enough to crack glass.
    Biological weapons are a disgrace to biology. Most biologists haven’t wanted to talk, or even think about them. For years leading U.S. biologists were assuring themselves and the public that bio- weapons don’t work and aren’t anything to worry about. It was a naive dream from the childhood of biology. The physicists lost their innocence when the first nuclear bomb went off in 1945. The biologists will lose their innocence when the first biological weapon spreads through the human species.
    The 20th century lived with the nuclear bomb, and there was neat economic and scientific progress and much human happiness. The same can be true in the next century. Our tools for defending against new diseases are improving all the time. Vaccines are getting better. Drugs to fight bugs are advancing. And new vaccines are coming that will identify an infectious agent in seconds.
    Our greatest weapons against the bugs will always be our mind. Dr. Jeffrey Koplan, director of the Centers for Disease Control and Prevention, predicts that in the end, the fight will come down to the same methods that disease hunters have always used to find bugs and stop them. "Shoed-leather epidermology"(皮肤学) is what Koplan calls it. "You wear out your shoes investigating an outbreak," he says, "You go around identifying the source of the disease and figuring out how it’s being spread and then you remove the source, Even if it’s leather-shoed epidermology, we’ll do it. No matter how great our technology, we’ll still have to go side by side with the bacterium. We may not completely win the 21st century bug hunt, but I am confident that we won’t lose it.
选项 A、The advantages in using bio-weapon
B、The trend of nuclear weapon development
C、A variety of weapons invented by man
D、The history of nuclear weapon development
答案C
解析 主旨题。第一段的第一个句子就是段落的主题句。整个段落介绍了人类迄今为止所发明的各种武器。
转载请注明原文地址:https://kaotiyun.com/show/yOR7777K
0

大学英语四级

相关试题推荐
随机试题
最新回复(0)