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古近纪哺乳动物还没出现。()
参考答案：错误

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恐龙在白垩纪末期全部灭绝。()

According to the passage, when bored, we usually

A. trigger less brain activity.
B. concentrate on time passing.
C. pay less attention to duration.
D. care less about time passing.

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生物死后快速被埋起来有利于保存为化石。()

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The passage mainly aims to

A. explain why time flies when people have fun.
B. prove time slows when having fun.
C. explain brain activity when having fun.
D. illustrate why time flies.

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古近纪哺乳动物还没出现。()参考答案：错误

恐龙在白垩纪末期全部灭绝。()

According to the passage, when bored, we usually

生物死后快速被埋起来有利于保存为化石。()

The passage mainly aims to

古近纪哺乳动物还没出现。()
参考答案：错误