The view _______ many scientists hold is ______ too much emission of carbon dioxide is destructive.为什么两个空都不能用which,而用that,有什么区别嘛?

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The view _______ many scientists hold is ______ too much emission of carbon dioxide is destructive.为什么两个空都不能用which,而用that,有什么区别嘛?

The view _______ many scientists hold is ______ too much emission of carbon dioxide is destructive.为什么两个空都不能用which,而用that,有什么区别嘛?
The view _______ many scientists hold is ______ too much emission of carbon dioxide is destructive.
为什么两个空都不能用which,而用that,有什么区别嘛?

The view _______ many scientists hold is ______ too much emission of carbon dioxide is destructive.为什么两个空都不能用which,而用that,有什么区别嘛?
第一空是定语从句 可以填which 也可以填that,也可以不填任何的关系代词
第二空是表语从句 第二空只能填that,表语从句中不缺少任何的成分,that 只起连接词的作用,that不可以省略.

The view that many scientists hold is that too much emission of carbon dioxide is destructive.
观点是,许多科学家认为大量放射的二氧化碳是有害的。
分析:
第一个that引导的是定语从句。
第二个that引导的是宾语从句,“much emission of carbon ...

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The view that many scientists hold is that too much emission of carbon dioxide is destructive.
观点是,许多科学家认为大量放射的二氧化碳是有害的。
分析:
第一个that引导的是定语从句。
第二个that引导的是宾语从句,“much emission of carbon dioxide is destructive大量放射的二氧化碳是有害的”作为了句子的宾语成分。
————————
不用that的情况
a) 在引导非限定性定语从句时。
(错) The tree, that is four hundred years old, is very famous here.
b) 介词后不能用。
We depend on the land from which we get our food.
We depend on the land that/which we get our food from.
2) 只能用that作为定语从句的关系代词的情况
a) 在there be 句型中,只用that,不用which。
b) 在不定代词,如:anything, nothing, the one, all, much, few, any, little等作先行词时,只用that,不用which。
c) 先行词有the only, the very修饰时,只用that。
d) 先行词为序数词、数词、形容词最高级时,只用that。.
e) 先行词既有人,又有物时。

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