38、The following is a letter to the editor of an environmental magazine.
The decline in the numbers of amphibians worldwide clearly indicates the global pollution of water and air. Two studies of amphibians in Yosemite National Park in California confirm my conclusion. In 1915 there were seven species of amphibians in the park, and there were abundant numbers of each species. However, in 1992 there were only four species of amphibians observed in the park, and the numbers of each species were drastically reduced. The decline in Yosemite has been blamed on the introduction of trout into the parks waters, which began in 1920 . But the introduction of trout cannot be the real reason for the Yosemite decline because it does not explain the worldwide decline.
这个that if是什么意思
that与what引导名词性从句的区别
whoever与no matter who有哪些区别
不要在定语从句使用与关系代词同义的人称代词
定语从句与其他从句的区别
限制性定语从句与非限制性定语从句的六点区别
关系代词who与whom的用法区别
关系代词as与which的用法区别
备考定语从句的七个错点
that与which的用法区别
这个in what 应如何理解
英语基础语法——定语从句
名词性wh-从句
what与that引导名词性从句时有何区别
定语从句的限制性与非限制性
that与whether (if)引导名词性从句的区别
定语从句关系词的用法与选择
什么是名词性从句的三要素
定语从句中关系副词的用法
引导名词性从句的连接词
两组关系代词的用法辨析
省略关系词的几种情形
名词性从句的三个基本要素
谈谈“介词+关系代词”的用法
英语关系副词用法说明
八种宾语从句不省略that
如何区别引导名词从句的whether与that
英语基础语法——名词性从句
如何理解in+what从句?
that, why 与 because 引导表语从句时的区别
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