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下面这两个句子哪个是正确的呀Computermodelscanbeusedtodemonstratethewaywhichcellsworkin.Computermodelscanbeusedtodemonstratethewaywhichcellswork.到底加不加in呀,谁能帮我解释一下?

题目详情
下面这两个句子哪个是正确的呀
Computer models can be used to demonstrate the way which cells work in.
Computer models _can be used to demonstrate the way which cells work.
到底加不加in呀,谁能帮我解释一下?
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答案和解析
要加,不过要加在前面:“in which cells work” .最后面就不用.