[有没有小学一年级下册数学应用题10道]一年级数学应用题练习 1、同学们要做10个灯笼，已做好8个，还要做多少个？ 2、从花上飞走了6只蝴蝶，又飞走了5只，两次飞走了多少只？ 3、飞机场上有15架飞机，飞走了3架，现在机场上有飞机...+阅读
Many wild animals are facing the danger of extinction, because the environment that they are living in has changed greatly. For example,with the developmet of cities, the using of insecticide and serious pollution, their living areas have become narrowcr and narrower. Many of the wild animals, now are confronted with food crisis. At the same time, man is killing off species just for getting their fur, skin, horns, teeth and meat.
In order to protect our resources of ecology,people should realize that the loss of any species is at least the loss of source of knowledge and a source of natural beauty. There fore, measures of the following should be takenpollution standards are made to keepdown poisons;killing off certain rare species is prohibited,national parks should be set up as wild life,reserves.
Only if we human beings take some drastic measures can wild animals be preserved.
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