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原標題：老师放2个跳d放在里面上课文

學習快評丨qibao666888　　“薄??(bo)如??(ru)蟬?(chan)翼??(yi)”的??(de)土?(tu)星??(xing)環(huán)??(huan)是?(shi)由??(you)什??(shen)么??(me)組??(zu)成??(cheng)的??(de)？??　　北??(bei)京??(jing)天??(tian)文??(wen)館??(guan)的?(de)科??(ke)普??(pu)專??(zhuan)家?(jia)介??(jie)紹??(shao)??，看??(kan)上?(shang)去??(qu)美??(mei)麗??(li)的??(de)土??(tu)星??(xing)光??(guang)環(huán)??(huan)??，實??(shi)際??(ji)上?(shang)是??(shi)由??(you)無??(wu)數(shù)??(shu)水??(shui)冰??(bing)顆??(ke)粒??(li)、巖??(yan)石??(shi)碎??(sui)片??(pian)和??(he)塵?(chen)埃??(ai)構(gòu)??(gou)成??(cheng)??，規(guī)??(gui)模??(mo)超??(chao)級??(ji)龐??(pang)大??(da)??，但??(dan)是??(shi)厚??(hou)度??(du)有??(you)的??(de)地??(di)方??(fang)是?(shi)摩??(mo)天??(tian)大?(da)樓??(lou)??，有??(you)的??(de)地??(di)方??(fang)卻??(que)只??(zhi)有??(you)平??(ping)房??(fang)那??(na)么??(me)高??(gao)??，平??(ping)均??(jun)下??(xia)來??(lai)也??(ye)就?(jiu)十??(shi)多??(duo)米??(mi)??。??。