ผมสงสัยอยากรู้ครับว่าทำไมคนเราตอนประถมมัธยม ต้องเรียนวันล่ะ 7-8 คาบ วันจันทร์-ศุกร์ คาบละไม่ถึง 1 ชั่วโมง

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โปรดศึกษาและยอมรับนโยบายข้อมูลส่วนบุคคลก่อนเริ่มใช้งาน อ่านเพิ่มเติมได้ที่นี่