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There are several ways you can find out about the countries and places you wish to visit. You can talk to friends who have travelled to the places. Or you can go and see a colour film. Or you can read travel books. It would seem that there are three kinds of travel books. The first are those that give a personal, subjective (主观的) account of travels which the author has actually made himself, if they are informative and have a good index (索引), then they can be useful to you when you are planning your travels. The second kind are those books whose purpose is to give a purely objective (客观的)description of things to be done and seen. If a well-read, cultured person has written such a book, then it is even more useful. It can be sorted as a selected guide book. The third kind are those books which are called "a guide" to some place or other. If they are good, they will, in addition to their factual information, give an analysis or an explanation. Like the first kind they can be inspiring and interesting. But their basic purpose is to help the reader who wishes to plan in the most practical way. Whatever kind of travel book you choose you must make sure that it does not describe everything as "wonderful", "excellent" or "magical". You must also note its date of publication because travel is a very practical affair and many things change quickly in the twenty-first century. Finally, you should make sure that the contents are well presented and easy to find.The date of the publication must be noticed because （）.
列车擅自退行是指未经行车调度员允许，列车向与运行方向相反的方向运行。
柴油发电机组由哪些机构和系统组成？
下列磺酰脲类口服降糖药中，适宜于糖尿病合并肾病患者的是（）
全能项目以及径赛各赛次之间，要保证有最短间隔休息的时间。比赛的最短间隔时间为：200米及200米以下各项为（）分钟；200米以上至1000米各项为（）分钟；1000米以上各项目（）。全能各单项间休息（）分钟，以（）结束比赛到下项比赛（）开始计算时间。
计算题：取长度为0.5m的某种蚕丝绳，测得其干闪电压为170kV，问在良好天气中对500kV系统的设备进行带电作业时，地电位操作工手握绝缘绳的位置与带电体间不得小于多少米？（计算时不考虑各种过电压的影响。）
什么是粒子数反转？
非营利组织的项目管理是指为了实现其总之，通过项目的形势获取、配置和邮箱里用各种社会资源的过程。
关于下腔静脉的CT检查，下列哪项有错误（）。
关于基金经理的任职条件，以下描述错误的是（ ）。
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