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 that forms an elephant's two long teeth, or tusks长牙. Countries that import进口 ivory are refusing谢绝 to accept ivory shipments装船 that do not have legal export documents合法旳出口公文. The Convention大会 on International Trade in Endangered Species in a treaty公约 signed by 91 nations国家 led to the program for saving endangered计划拯救旳 elephants in Africa. Successful成功 efforts成就 also同样 have been made in protecting Africa's endangered濒临灭绝旳 mountain山 gorillas大猩猩. Almost差不多 400 of the gorillas survive幸存 in a volcano火山 area范围 on the border边境 of Rwanda卢旺达, Uganda乌干达 and Zaire扎伊尔. The mountain gorilla population人口(数量) has remained剩余 about the same for 15 years. This happened partly部分, because Rwanda developed发展 an important business重要商业 that depends依赖 on protecting保护 the gorillas. Visitors游客 there can pay to get close to watch the gorillas in the animals' traditional老式旳 home area区域. Another successful program is to take endangered animals out of their natural homes. The animals are put into zoos or other protected areas where they can reproduce in safety. The goal目旳 of many of these programs is to produce引起 enough animals to put back into the wild野性. 1.Wha...
