单项选择,渴望有解释的回答The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them选哪个,别的为什么不行,这是关系从句吗?

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单项选择,渴望有解释的回答The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them选哪个,别的为什么不行,这是关系从句吗?
单项选择,渴望有解释的回答
The medicine has many functions,__are unknown to us
A SOME OF WHICH
B that some of them
C of which some of them
d whcih of them
选哪个,别的为什么不行,这是关系从句吗?

单项选择,渴望有解释的回答The medicine has many functions,__are unknown to usA SOME OF WHICHB that some of themC of which some of themd whcih of them选哪个,别的为什么不行,这是关系从句吗?
答案A.some of which
The medicine has many functions,(some of which) are unknown to us.
翻译:药有许多功能,鞭中一些我们尚未得而知.
改写
The medicine has many functions.Some of the functions are unknown to us.
some of which引导的是一个定语从句,修饰前面的functions
其他几个无论从语法还是意思上都不合理

a