Page 143 - วิทยาศาสตร์ม.ปลาย
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143




                   11.  ทรัพยากรธรรมชาติ  หมายถึง
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                   12.  ทรัพยากรธรรมชาติแบ่งออกเป็นกี่ประเภท  อะไรบ้าง

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