2. 外语
  3. Pollution is caused either by man’s release of completely new and often artificial (人造) substances into the environment, or by r

Pollution is caused either by man’s release of completely new and often artificial (人造) substances into the environment, or by r

admin2012-03-26  47
问题 Pollution is caused either by man’s release of completely new and often artificial (人造) substances into the environment, or by releasing greatly increased amounts of a natural substance (物质), such as oil from oil tankers into the sea.
选项
答案有两种情况可以造成污染。一是人类向周围环境排放新的人造物质；二是排放大量的天然物质，如油轮在海上发生泄油事件。
解析
转载请注明原文地址:https://kaotiyun.com/show/1iJO777K
0

成人本科学位英语

相关试题推荐
随机试题
最新回复(0)