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2 năm trước
Một thửa ruộnghình thang có đáy lớn 25,5 m đáy bé kém đáy lớn 1m chiều cao bằng trình bình cộng hai đáy . Tính diện tích thửa ruộng hình thang đó
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Desert zone and south-north pole residents will use the natural resources to build up houses. Desert zone residents will use thick soil as house exteriors and south-north pole residents will use ice and snow to build igloos. What is the common characteristics between these 2 houses? A. Soil and ice will prevent heat to enter the house but cannot prevent heat to release from the house. B. Soil and ice will prevent heat to release from the house but cannot prevent heat to enter the house. C. Soil and ice will mix with air to prevent heat to enter the house and to release from the house. D. Soil and ice can prevent heat to enter the house and to release from the house. E. Soil and ice don’t have useful function for the flowing direction. Residents can just make good use of the resources to build up the houses.

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