Thẻ: Hoc tap 2022

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Verse 44: In the very distant geological past, all animals were aquatic. The very first vertebrates or animals with backbones, of which we have any fossil record, lived in water. These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: they had muscular tails so that they could swim swiftly in such a dense medium as water; and they were endowed with gills for breathing underwater. Descendants of fish-type ancestors crossed the seashore barrier and accommodated themselves to life on land. As amphibians, they possess limbs instead of fins and lungs instead of gills. But they never became completely free of the bonds that tied them to the water; even today many amphibians return to the water to lay their eggs. Millions of years after the first clumsy amphibians crawled over the land, newer types of land dwellers appeared, these animals give rise to the present-day reptiles and mammals. They were completely converted for land dwelling, with bodies and biological activities far different from those of fish. With these special adaptations, mammals have been able to colonize the woods and meadows, the deserts and high mountains, often far removed from the sea. An example of an amphibian’s incomplete adaptation to land life is…….

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Verse 44: In the very distant geological past, all animals were aquatic. The very first vertebrates or animals with backbones, of which we have any fossil record, lived in water. These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: they had muscular tails so […]

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Inside the 12,000 square meter kitchen – LLODO

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At the same time, Gate Gourmet is also responsible for ensuring that meals are always fresh in the event of flight delays. “We have people outside monitoring the temperature, so if the food goes above 50 degrees in a certain amount of time, we have to change the temperature.”Rafreedie.“However, newer planes have refrigeration, so cold […]

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Cho mặt cầu (left( S right):{left( {x – 1} right)^2} + {left( {y – 2} right)^2} + {left( {z – 3} right)^2} = 4) và điểm (A in left( S right)). Gọi (Bleft( {a;b;c} right)) là điểm thỏa mãn (overrightarrow {AB} ) cùng phương với (overrightarrow u = left( {1; – 1;2} right)) và (2a – b + 3c + 5 = 0). Độ dài đoạn thẳng (AB) lớn nhất bằng – Sách Toán

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Cho mặt cầu (left( S right):{left( {x – 1} right)^2} + {left( {y – 2} right)^2} + {left( {z – 3} right)^2} = 4) và điểm (A in left( S right)). Gọi (Bleft( {a;b;c} right)) là điểm thỏa mãn (overrightarrow {AB} ) cùng phương với (overrightarrow u = left( {1; – 1;2} right)) và (2a […]

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