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Stack #4572525

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ماذا يحدث للأوعية الدموية عند ارتفاع درجة الحرارة ؟ تضيق
ماذا يحدث للأوعية الدموية عند البرد الشديد ؟ تتسع
ماذا يحدث للشعر عند ارتفاع درجة الحرارة ؟ على نحو ممدد
ماذا يحدث للشعر عند انخفاض درجة الحرارة ؟ يقف
ما أهمية العرق؟ تبريد الجسم
Created by: user-1738937
 

 



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