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What is known to us all is that America is a developed country belonging to the First World.What is known to us all 是整个句子的主语的话, IS是谓语, 那么后面that Ameriaca is a developed country belonging to the First World 这一整

题目详情
What is known to us all is that America is a developed country belonging to the First World.
What is known to us all 是整个句子的主语的话, IS是谓语, 那么后面that Ameriaca is a developed country belonging to the First World 这一整句是表语吗?
是一个主语从句+一个表语从句?
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答案和解析
没错,你的分析完全正确.