精选优质文档-倾情为你奉上阅读理解1.While plant植物 and animal动物 species种类 are disappearing消失 at a rapidly迅速 increasing增长 rate比率 throughout the world, scientists科学家 note记录 some success stories成功故事. For example, the number of elephants象 killed illegally不法地 in Africa has fallen sharply急剧下降. 89 thousand were killed in 1983. 46thousand were killed one year later.This happened because African countries国家 agreed to establish建立 export limits出口限制 on ivory象牙 from elephants. Ivory is the hard white material物质 th
