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回答于 2022-02-06 08:06
▲看了两位老师的解答,很受启发。但另一个问题又来了,在我们的英语教材(牛津英语模块五(Unit 3—Reading—The perfect copy)中有这样一段:Cloning is producing an exact copy of a plant or an animal using its cells. The first mammal to be cloned successfully from an adult cell was dolly the sheep. She was b...
回答于 1秒前