We can't hope to solve all the ecological problems,____arise

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We can't hope to solve all the ecological problems,____arise directly or indirely from overuse of
the earth's resources.
A.many of them B.in which many C.many of which D.of which they
选什么.求详解

C 非限制性定语从句
再问：详解....
再答：有逗号隔开的定语从句不能省略先行词which which和they不能一起用D排除
再问：为什么是定语从句，为什么就不能用many of them
再答：那前面就要用句号

We can't hope to solve all the ecological problems,____arise we can't hope to solve all the ecologic problems,_____arise The problems are such difficult ones that we can't solve the We can’t solve problems by using the same kind of thinking w 英语翻译We can't solve problems by using the same kind of thinki The problems are such that we can't solve by ourselves. The problems are such _____ we can't solve by ourselves.A as If you can't solve the problems ______,try to ask for he i hope i can forget all the problems this times. we still have a long way to go to solve all problems 的同义句 Who can solve the following math problems? who can help me solve the problems?