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“燕子石”常见于山东地区的寒武纪地层。()

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What does the passage suggest to people when they are not living in a country where the language is spoken？

A. They go to movies, watch TV, and read newspaper and magazines.
B. They make friends who speak the language.
C. They make to class.
D. They study grammar and vocabulary.

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“燕子石”常见于山东地区的寒武纪地层。()

前寒武纪生物类型及数量丰富,化石发现。()参考答案：错误

腕足动物和河蚌、扇贝等双壳动物属于同一个动物门。()参考答案：错误

埃迪卡拉动物群出现于前寒武纪末期。()

What does the passage suggest to people when they are not living in a country where the language is spoken？

前寒武纪生物类型及数量丰富,化石发现。()
参考答案：错误

腕足动物和河蚌、扇贝等双壳动物属于同一个动物门。()
参考答案：错误