题目内容
你知道恐龙为什么在大约65万年前突然灭绝了?
Do you know ________________________________________about 65 million years ago?
why dinosaurs died out suddenly
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题目内容
你知道恐龙为什么在大约65万年前突然灭绝了?
Do you know ________________________________________about 65 million years ago?
why dinosaurs died out suddenly