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1.It is global warming,rather than other factors,______the e

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1.It is global warming,rather than other factors,______the extreme weather.
B.which has caused C.which have caused 说明定语从句的说明对象 要有根据哦
1.It is global warming,rather than other factors,______the e
选B.定语从句修饰的是global warming,而global warming是单数,所以用has,所以选B.rather than other factors 作为插入语,同样是修饰global warming,但是不对定语从句产生影响