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乳糜性腹腔积液的特点不包括（）.
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下列关于营业税的纳税义务发生时间的表述中，不正确的是（）
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卫星电视常用的频段有（），其噪声系数的单位用K来表示以及KU频段，其噪声系数的单位用dB表示。
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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10处填上正确答案（）
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水泥细度检验时，80μm筛析试验称取试样量为（）。
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枪支的膛线向右旋转的，其右边的一侧叫（）。
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处理开放性骨折的最关键性步骤为（）
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爆炸混合物的爆炸下限大于4%的，气体分析浓度小于（）才能执行置换动火。
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马克思说过，只要英国人“把机器用于一个有煤有铁的国家的交通上”，“就无法阻止这个国家去制造这些机器了”。对于这段话的正确理解是（）
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疼痛兼有空虚感是因为（ ）