The passage mainly discusses . When stem cells specialize, they .

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问题 The passage mainly discusses ______.
When stem cells specialize, they ______.

选项 A、grow into body parts
B、are destroyed
C、are set back to a pristine state
D、turn nose into kidney

答案A

解析

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本试题收录于：公共英语五级笔试题库公共英语（PETS）分类

公共英语五级笔试

公共英语（PETS）

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The passage mainly discusses ______. When stem cells specialize, they ______.

公共英语五级笔试

公共英语（PETS）

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