问题
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An Englishman invented the fridge in the 1920s. 查看材
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Which of the following is NOT the problem that hinders the real invention?A.There"s a kind
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The invention of chopsticks reflects the wisdom of Chinese ancient people.
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Which of the following statements is INCORRECT about the umbrella?A.No one exactly knows w
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The first invention of mankind was the wheel. The invention of the wheel is probably the
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An Englishman invented the fridge in the 1920s.A.
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