sound cannot travel through, oceans, liquids, caves, houses, space, forests, sound travels better through, gasses, liquids, sound travels at different materials, true, false, sound waves travel at the same speed, true, false, sound waves can travel through doors and walls, false, true.

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟