请根据短文内容,回答题。Washoe Learned American Sign Language(1) An anim

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The women with high levels of PAHs in their blood were more

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一个健康儿前囟2.0cm×2.0cm,体重7kg,能独坐一会、用手摇玩具,能认识熟人和陌生人,其月龄为

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