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常见序列文件格式的后缀名是

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方解石的形态可以是柱状的、粒状的、片状的，与生长环境有关。

普通的数字卫星接收机既能接收数字卫星节目，又能接收模拟卫星节目。

出口应退增值税税额应等于外贸含增值税的采购金额乘以出口退税率

Many people came from many countries to see it and a lot of goods were sent to the exhibition from different places of the world, and also a lot of machinery were exhibited, among which the most wonderful machine was a steam hammer.