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题目：
单选题
A阵发性房性心动过速
B室性期前收缩
C心室颤动
D心房颤动
E预激综合征
答案：
<查看本题扣1积分>
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马德里保卫战
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在远达片后前立位上，右心缘上段为
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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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计算题：某锅炉的额定容量为670t/h，燃煤量为98t/h，制粉系统单耗nzh=2kwh/t煤，吸风机单耗nx=2.4kwh/t汽，送风机单耗ns=3.5kwh/t汽，给水泵单耗nj=8kwh/t汽，求锅炉辅机每小时总耗电量为多少？
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从市场地理范围大小看，若促销对象是小规模的本地市场，应以______推销为主。
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信息系统运营、使用单位及个人依据（）和相关技术标准对信息系统进行保护。
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下列设备中，（）的操作是单向的：
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直肠位于盆腔的后部，上接______，下连______。
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外币活期储蓄的起存金额为（）
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研究组织的运行及其规律的学科是（）。