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My sister met him at the Grand Theatre yesterday aftemoon , so he _____ your lecture. [ ]
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Tom isn't Chinese. He's _______ English boy. [ ]
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Kunming is a beautiful city ________ flowers and green grass and trees are seen all year round.
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甲,乙两火车站相距1280米,采用“和谐”号动车组提速后,列车行驶速度是原来速度的3.2倍,从甲站到乙站的时间缩短了11小时,求列车提速后的速度?(列方程)
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1年前