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线段AB上有C点,使AC;CB=2;3,点M和N分别是线段AC和线段BC的中点,若MN=5,求AN的长
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his voice is ,.A aloud B loudly C loudness D loud 不是选b吗形容词作表
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用介词填空:He was here______a quarter to eleven.Now he is______th
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_________ eight-year-old girl saw _________ UFO yesterday. A
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I can't stand studying with him,because he intends ____me al
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