A. taking the Jasper Skytram and eating in the restaurant
B. taking the Banff-Jasper loop and Jasper Skytram
(B)
For several years, scientists have been testing a substance called interferon(干扰素), a possible wonder drug that is proving to be effective in treating a variety of diseases, including virus infections, bacterial infections, and cancers. To date, the new drug has no side effect of great influence to discourage its use.
But in spite of its success, last year only one gram was produced in the entire world.
The reason for the shortage lies in the structure of interferon. A special protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infecting white blood cells with a virus. Fortunately, it is so effective that the amount given to each patient each time is very small.
Unlike antibiotics (抗生素), interferon does not attack germs directly. Instead, it protects healthy cells from being infected, and prevents the reproduction of viruses within cells.
As you might conclude, one of the most special uses of interferon has been in the treatment of cancer. Dr. Hans Strander, a research physician at Sweden’s famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients who had received operations for advanced cancer, half were given
【2016高考英语二轮复习专题限时训练(江苏专用)专题2 阅读理解20】相关文章:
★ 湖南省岳阳市2014高考英语一轮单项选择训练题(3)及答案
★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (25)
★ (全国通用)2014届高考英语一轮单元复习 限时强化训练七
★ 【三维设计】2017届高考英语(江苏专用)二轮复习完形填空解题技法示范课件:2
★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文:体验真题(含解析)
★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练:第16组(含解析)
★ 【课堂新坐标】2017届高考英语(通用版)二轮复习短文改错专题训练:考法2 句法错误(含解析)
★ 四川省广安市2014高考英语一轮基础训练题(11)及答案
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21