高一英语语法名词性从句问题Physics is the equivalent of ______ ueed to be called natural philosophy.A that B all C which D what

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高一英语语法名词性从句问题Physicsistheequivalentof______ueedtobecallednaturalphilosophy.AthatBallCwhichDwhat高一英语语

高一英语语法名词性从句问题Physics is the equivalent of ______ ueed to be called natural philosophy.A that B all C which D what
高一英语语法名词性从句问题
Physics is the equivalent of ______ ueed to be called natural philosophy.
A that
B all
C which
D what

高一英语语法名词性从句问题Physics is the equivalent of ______ ueed to be called natural philosophy.A that B all C which D what
这句话的意思是:物理学就是过去被称作自然科学的学科.
that引导名词性从句只起连接作用,在从句中不作任何成分,无意义,在宾语从句通常省略,但在主语从句、表语从句和同位语从句中均不能省略;what除引导从句外,还在从句中作成分,意为“所„„的(东西)”,在含义上等于“名词+that”.
分析of后的部分,明显缺少主语,所以用what代替主语.

______ used to be called natural philosophy是of 介词的宾语,即宾语从句,而宾语从句中缺少的事主语。what在名词性从句中充当主语,宾语和表语。所以此处选what。句意:物理学就是过去被称作自然科学的学科。