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سؤال بيئي يومي (12.23)

2016-12-23View Original

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سؤال اختيار من متعدد: كلما قل قطر الفقاعة، زادت سرعة صعودها، وقل الوقت الذي تقضيه في التلامس مع الشوائب الممتصة، مما يعزز فعالية عملية الطفو. أ. بطيء. قصير ب. سريع. قصير ج. سريع. طويل د. بطيء. طويل الاختيار: د

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