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roytran30062002
2 năm trước
Giải phương trình: 5/x-3+4/x+3+x-5/9-x^2=0
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Read the following passage, and then decide True (T) or False (F) for the following sentences. “Sky Whale” is a plane with four engines that can carries over 700 people. The airplane will exist for short distance between cities. The technology will use eco-engines with energy recovery systems which are able to feed back to the planes themselves. With a capacity to transport a large number of passengers, like a train of high speed, "Sky Whale" will be a safer type of planes for the future. We will also have supersonic planes which are transcontinental or transoceanic. They can fly at very high altitudes more than 30,000 meters and at record speeds. The engines which can change according to the situations are called intelligent engines. _____ 1."Sky Whale" can carry a large number of passengers. _____ 2. The airplane will be used for long distances between cities because it has four engines. _____ 3. "Sky Whale" can travel at a high speed. _____ 4.Transcontinental planes can fly at the maximum altitude of 3.000 metres and at record speeds. _____ 5.Intelligent engines are the ones that can change according to the situations.

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