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停放由内燃机驱动且无轨道的客车、货车、工程车等汽车的建（.....
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Immigration to the United States by people with shorter average height is no reason for th..
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患者，女，30岁。带下量多，色黄而稠，少腹隐痛，阴部瘙痒，.....
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Maternal deaths and infant mortality are loosely connected with the patterns of reproducti..
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Population growth is the sole factor that has widened the gap between developing and devel..
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听力原文：We know that we have to pay for what w.....
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