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which能单独引导状语从句吗

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which能单独引导状语从句吗
在考研作文里看到下面这几句话:
Why can some people achieve their goals even they are confronted with seemingly impossible tasks?I think faith works.These people believe in themselves,which can stimulate courage.With faith and ……
请问里面的which是单独引导状语从句吗,有这么用的吗?还是作其他的作用?
从你的问题可以感觉到你对which引导的非限制性定语从句不是太了解,加了逗号使你觉得好象是一个独立的句子,其实不是,它仍然是一个附属于主句的从句.which引导非限制性定语从句时,既可以指代整个主句内容,也可以指代部分内容.如:
The sun heats the earth ,which makes it possible for plants to grow .
太阳给予大地热,这就使植物的生长成为可能.(which指代整个主句内容)
The most important form of energy is electrical energy ,which is widely used in our daily life .
最重要的能源形式是电能,它广泛地运用于我们的日常生活.(which指代先行词electrical energy).
你所给的例子就是which指代整个主句内容的用法.