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英语高手请进What is needed in the case of noise is a study of larg

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英语高手请进
What is needed in the case of noise is a study of large numbers of people living noisy conditions,to discover whether they are mentally ill more often than other people.
译文:对于噪音问题,需要对大量生活在噪音中的人进行研究,看一看他们是否比其他人更易患精神病.
请从语法角度分析一下句子.
What is needed in the case of
英语高手请进What is needed in the case of noise is a study of larg
主干:What is a study.(肯定句)
What is needed in the case of noise 是一个what引导的从句,谓语是noise后面的is,宾语是study,是一个什么样的study呢?a study of large numbers of people living noisy conditions 这里living noisy conditions是伴随状语.
to discover whether they are mentally ill more often than other people.则是目的状语.
明白了吗?
补充:What is needed in the case of noise是指代需要对噪音所做的事情.