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陆地水中，占总水量比例最大的是()。
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（）是指造成30人以上死亡，或者100人以上重伤，或者1亿元以上直接损失的事故。
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由高中进入大学，大学生要应对的变化有()。
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急性心肌梗死后24小时出现的室性期前收缩（）
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In every cultivated language, there are two great classes of words which, taken together, comprise the whole vocabulary. First, there are those words（1）which we become acquainted in daily conversation, which we（2）,that is to say, from the（3） of our own family and from our familiar associates, and（4） we should know and use （5 ）we could not read or write. They （6） the common things of life, and are the stock in trade of all who （7） the language. Such words may be called“popular”, since they belong to the people （8） and are not the exclusive （9） of a limited class. On the other hand, our language （10） a multitude of words which are comparatively （11） used in ordinary conversation. Their meanings are known to every educated person, but there is little （12） to use them at home or in the market-place. Our （13） acquaintance with them comes not from our mother's （14） or from the talk of our school-mates, （15） from books that we read, lectures that we （16） ,or the more （17）conversation of highly educated speakers who are discussing some particular （18） n a style appropriately elevated above the habitual（19） f everyday life. Such words are called“learned”, and the （20） between them and the“popular”words is of great importance to a right understanding of linguistic process. 请在15处填上正确答案（）
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翻译：故别虽一绪，事乃万族。
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有关股骨干骨折的治疗哪一项是错误的：（）。
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变速器操纵杆是（）的操纵装置，用于改变车辆的行驶速度、转矩和方向。
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男，55岁，长期吸烟。现持续性咳嗽，且痰中带血。做痰液脱落细胞学检查。涂片中细胞体积较大，呈圆形或卵圆形，成片分布；胞核呈圆形、卵圆形，略偏位，染色质细致均匀；胞质丰富，含有黑色颗粒，提示可能为（）
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在事故中，车与车或车与障碍物的接触时间为（），追尾及侧面碰撞时间为。