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题库 / Prep2007E1-SC-64
Recently documented examples of neurogenesis, 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.
the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
mice's brains that grow when they are placed in a stimulating environment or canaries' neurons that increase when they
the brain growth in mice when placed in a stimulating environment or the increase in canaries' neurons when they
brain growth in mice that are placed in a stimulating environment or an increase in neurons in canaries that
e选项看不懂那个or是什么，include不是用and吗？为什么是or啊？
首先吧，这点不太重要，因为五个选项在这个地方都是一样的。至于为什么用or，我想是因为，由于老鼠和金丝雀是两种不同的动物，它们的神经形成的情况是不同的。而examples里包括老鼠的或者金丝雀的，虽然两者不同，但神经形成的原理一样，包括哪个都可以。这里的or和and的意思差不多，只是表示老鼠和金丝雀的这两件事不同罢了。
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