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نشرة البيئة اليومية 7.22، مكافأة للمشاركة: 3 نقاط، ومكافأة إضافية 5 نقاط عن كل إجابة صحيحة

2016-07-22View Original

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سؤال اختيار من متعدد؛ يجب أن تُعالج مصادر التلوث التي تضر بمصادر المياه الصالحة للشرب ( ). أ. تحسينات ب. الإدارة ج. النقل د. غرامات. ج
Reply #22016-07-22
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