MOST people think that evolution (进化) takes at least tens of thousands of years.But the Atlantic tomcod (鳕鱼) has evolved, in just 50 years, to become resistant (有抵抗力的) to poisonous chemicals that poured into the Hudson and other rivers in North America.
21世纪报社版权所有，未经书面授权，禁止转载或建立镜像。 主办单位：中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号
京公网安备 11010502033664号
