问题
填空题
华北地区古太古代~新太古代是()形成、发育的时期,我国目前发现的最古老的地层为()群。
答案
参考答案:原始硅铝质陆壳(陆核);迁西群
华北地区古太古代~新太古代是()形成、发育的时期,我国目前发现的最古老的地层为()群。
参考答案:原始硅铝质陆壳(陆核);迁西群
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