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3. ตั้งสมมุติฐาน
4. การกําหนดตัวแปร(ถามี)
5. วิธีการดําเนินการ
6. ผลที่คาดวาจะไดรับ
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116 วิทยาศาสตร์ ระดับมัธยมศึกษาตอนต้น : พว21001
ส�ำนักงำน กศน.จังหวัดกำฬสินธุ์
