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【单选题】
一种分化成熟的细胞类型被另一种分化成熟的细胞类型所取代的现象称为A.
增生
B.
化生
C.
修复
D.
代偿
E.
损伤
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反馈参考答案：
举一反三
【简答题】食物中能量密度最高的营养素是( )。 A.蛋白质 B.脂肪 C.淀粉 D.葡萄糖
【单选题】concept
A.
join or combine
B.
idea; thought
C.
an instance of buying or selling something; a business deal
D.
succeed in catching or seizing
【单选题】In the author's opinion, the major cause of many people to make U-turns is that ______.
A.
they have eaten some drug which can change their identities.
B.
they become to consider the connections between different things.
C.
they want to succeed in catching some political opportunities.
D.
they have been stimulated by some big changes in their life experiences.
【简答题】His wife got even ____ ___ ___ ___ ( angry ) when he forgot to buy her a gift on valentine’s day again.
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