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女，26岁。有十二指肠球部溃疡5年，突感中上腹部剧烈疼痛6小时，继之满腹疼痛，大汗淋漓，体检：全腹有压痛，肌紧张及反跳痛，考虑有溃疡病穿孔可能。胃溃疡穿孔最常见于哪一部位（）
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沼肥
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在放样前，直接移动或者（）对它在放样中的作用没有影响。
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肥胖生殖无能综合征的闭经属于（）
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影响脑卒中患者功能的因素有（）
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维修井巷撤换支架时，必须（）。
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男，34岁，5天前有不洁性接触史，昨日开始尿痛、尿频、尿道口少许分泌物，今日症状加重，分泌物变成黄色脓性，拟诊断淋病确诊淋病的检验结果应是（）。
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人类免疫缺陷病毒哪种蛋白能介导病毒包膜与宿主细胞膜发生融合（）
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矿石（）的筛分为预先筛分。
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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（）