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da guan yuan
Author(s): 
Pages: 35
Year: Issue:  12
Journal: Required Reading for Junior Middle School Students

Abstract: <正>漂移的星系围绕银河系运转的小星系大麦哲伦星系,正以相对于我们自己的星系每秒378±18千米的速度运动。二氧化碳也能造"玻璃"科学家发现,在50万个大气压下,二氧化碳气体变成了像我们平常使用的玻璃一样的晶状固体。
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