15. Recently documented examples of neurogenesis（神经形成）, the production of new brain cells, include the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.DE
A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
D. the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
A: when placed的逻辑主语是production而不是邻近的mice，句意错；动名词growing和increasing应该改成名词growth，increase
B: they指代不明，可以指代brains或mice；第二个they和第一个they不是一个对象
C: they指代brains不对；第二个they和第一个they不是一个对象
D: when placed的逻辑主语是production而不是邻近的mice，句意错；
E: correct
这正确选项中的learn songs难道是修饰 neurons 吗？有大牛可以翻译一下此句吗？读不懂就是读不懂啊
这样根本做不出题了，就算我知道要看逻辑意思。我觉得这句话关键是在于平行，include brain growth in mice or an increase in neurons 。
learn new songs 应该是修饰前面的canaries 金丝雀。
句子主干的意思就是 例子包括 当把老鼠放在一个刺激性环境时，它们的智力增长 或者 当金丝雀学习唱新歌的时候，它们神经细胞的增加。
E. brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
是很工整的并列 A that + 定语从句 or B that + 定语从句
是很工整的并列
A that + 定语从句 or B that + 定语从句
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