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案例分析题某医院管理系统部分关系模式为：科室(科室号，科室名，负责人，电话)、病患(病历号，姓名，住址，联系电话)和职工(职工号，职工姓名，科室号，职位，住址，联系电话)。假设每个科室有一位负责人和一部电话，每个科室有若干名职工，一名职工只属于一个科室；一个医生可以为多个病患看病；一个病患可以由多个医生多次诊治；职位有医生、护士和其他。a．科室和职工的所属联系类型是（1），病患和医生的就诊联系类型是（2）。科室关系的主键和外键分别为（3）。对于就诊联系最合理的设计是（4），就诊关系的主键是（5）。b．若科室关系中的科室名是唯一的，并要求指出外码。请将下述SQL语句的空缺部分补充完整。CREATE TABLE 科室 (科室至号 CHAR(3) PRIMARY KEY,科室名 CHAR(10) （6）,负责人 CHAR(4),电话 CHAR(20),（7）); （4）处应选择（）
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The teacher did not let me pass the oral test, that upset me.
You are the secretary of Mr. Johnson, the managing director. Mr. Johnson wants you to introduce the newly developed computer hardware system on an international computer exhibition in Singapore next week. You would like to take 150 brochures and three sample printers with you. Write a memo to Mr. Henry Cross, the Sales Manager. Ask for his permission to take these items; Explain why you want them. Mention the date when you want them.
男性，65岁，有便秘多年。近半年来站立时发现阴囊部位出现肿块，呈梨形，平卧时可还纳。体检发现外环扩大，压迫内环嘱患者咳嗽，指尖有冲击感，平卧回纳肿块后，手指压迫内环处，站立咳嗽，肿块不再出现。 医生决定为该患者行疝修补术，为避免术后疾病复发，术前准备中最重要的是（）
案例分析题C is sometimes referred to as a ’high -level （） language’. Some people think that’s an insult, but it’s actually a deliberate and significant aspect of the language. If you have （） in assembly language, youll probably find C very natural and comfortable (although if you continue to focus too heavily on machine - level details, youll probably end up with unnecessarily non- portable programs). If you havent programmed in assembly language, you may be frustrated by C ’s lack of certain higher - level features. In either case, you should understand why C was de- signed this way: so that seemingly - simple constructions expressed in C would not expand to arbitrarily expensive ( in time or （） ) machine language constructions when （） . If you write a C program simply and succinctly, it is likely to result in a succinct, efficient machine language executable. If you find that the （） resulting from a C program is not efficient, it’s probably because of something silly you did, not because of something the compiler did behind your back which you have no control over. In any case, there’s no point in complaining about C’s low - level flavor: C is what it is. If you find that the （） resulting from a C program is not efficient.
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