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كيميائي
كيميائي
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March 27, 2007
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March 27, 2007
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الدوله
السعودية
ممكن اجابة سريعة ومقنعة
كيميائي replied to كيميائي's topic in
الشمس
جزاك الله خير أخي الكريم على هذا التوضيح الرائع ..
March 27, 2007
3 replies
ممكن اجابة سريعة ومقنعة
كيميائي posted a topic in
الشمس
هل تغير حجم الشمس منذ العصور الاولى وحتى عصرنا هذا مع بيان هل زادت أو نقصت ؟؟!!
March 27, 2007
3 replies
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