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填料支承装置是填料塔的主要附件之一，要求支承装置的自由截面积应（）填料层的自由截面积。
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对在检查中最后经确诊的职业病，用人单位应报（）。
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井下严禁采用（）电缆，采区低压电缆严禁采用铝芯。
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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16处填上正确答案（）
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电油汀的加热管采用的是（）。
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简述车用润滑脂的质量要求。
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影响药物吸收的下列因素中，不正确的是（）
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婴幼儿家庭养育的含义是（）。
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4-氨基安替比林分光光度法测定水中挥发酚时，如果水样中不存在于扰物，预蒸馏操作可以省略。
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叶轮上的平衡孔有何作用？