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• 阅读下面的短文, 完成下面的任务。 A new study finds people in big cities walking faster than before. Is the pace (节奏
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• 观察洋葱表皮细胞结构的实验步骤是[]A．制作标本、染色、画图、观察B．制作标本、观察、染色、画图C．染色、制作标本、观察、画图D．制作标本、染色、观察、画图-七年级生物
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• 阅读理解。 The idea of daylight saving time started with an American named Benjamin Franklin (1706-1790).
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