What在句子中做的是什么成分,指代的是什么?What seemingly were insurmountable hurdles are now reduced to obstacles of laughable insignificance.这里是不是what引导的一个主语从句,what在从句中做的是主语的成分?如果是what指代的是什么?如果不是主语从句也请说明原因.
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这里是what引导的是主语从句,指代的是reduced to obstacles of laughable insinificance
======以下答案可供参考======
供参考答案1:
这里是what引导的主语从句,在从句中做主语,指代的是reduced to obstacles of laughable insinificance
供参考答案2:
是的,充当主语