Checkyouranswerscarefullyandmakesomechanges
練習題2.74W
問題詳情:
Check your answers carefully and make some changes ____.
A. if it necessary B. if you are necessary C. if is necessary D. if necessary
【回答】
D知識點:固定句型
題型:選擇題
標籤:
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下列說法正確的是 A.物質發生化學反應都伴隨著能量變化B.伴有能量變化的物質變化都是化學變化C.在一個確...
問題詳情: 下列說法正確的是 A.物質發生化學反應都伴隨著能量變化B.伴有能量變化的物質變化都是化學變化C.在一個確定的化學反應關係中,反應物的總能量總是高於生成物的總能量D.放熱反應的發生無需任何條件【回答】A知識點:化學反應中的能量變化題型:選擇題...
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