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一氧化碳中毒患者口唇的颜色是（）
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液性指数I1说明土的软硬程度。用于确定（ ）的状态，和确定单桩极限承载力。
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地球绕太阳公转的路径叫（）
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不是启普发生器使用条件的是（）。
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平面机构在图示位置时，AB杆水平，BC杆铅直，滑块A沿水平面滑动的速度VA≠0，加速度aA=0，则此时BC杆的角速度wBC和角加速度αBC分别为：（）
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环境保护坚持保护优先、预防为主、综合治理、公众参与、损害担责的基本原则。
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受众调查中采集数据的方法主要有哪几种？
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三农问题历来是我们党关注和着重解决的问题。在党的十八大报告中，胡锦涛提出，解决好农业农村农民问题是全党工作重中之重，解决“三农”问题的根本途径是（）
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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8处填上正确答案（）
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软玉的结构常为隐晶或微晶纤维交织结构.