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简述GPS网的布网原则。
在协调下属的关系时，领导可以采用表扬为主，批评适度的方法。（）
上消化道出血最常见的病因是（ ）。
Materials and Tools for Language Learning ① The range of materials and tools available to help you with your language studies is huge, from dictionaries to language courses. All of them can help you in different ways, and the appropriate use of these materials and courses will make your language learning much easier and more effective. ② Possibly the most useful tools there are for learning a language are dictionaries. Dictionaries come in a number of formats including bilingual, monolingual, illustrated, electronic and online. Bilingual dictionaries are perhaps the most useful ones for beginners and intermediate learners, while monolingual dictionaries, which are designed for native speakers, are also useful for advanced learners. Pocket dictionaries are good for quick reference and easy to carry around. Larger dictionaries are better if you want more definitions, examples of usage, and information about pronunciation, and grammar. Electronic dictionaries are available as handheld units, or as software. Handheld ones are portable, easy and quick to search, and often provide other functions, such as, text-to-speech, voice recognition and speech synthesis organizers, address books. They tend to be rather expensive though. Software dictionaries offer many of the same functions, and can be used on computers, and mobile phones. ③ The traditional courses tend to consist of textbooks containing dialogues, exercises, notes on grammar, and maybe cultural information. Accompanying cassettes, CDs and/or mp3s are often available. Most such courses are intended for complete beginners or people with only minimal knowledge of the language. Intermediate and advanced-level courses are available for some of the popular languages, such as French, German, Italian and Spanish. ④ Audio courses usually consist solely of cassettes or CDs, though some may also include a limited amount of printed material. All dialogues, exercises, instructions and explanations are recorded and the focus of these courses is teaching you to understand and speak the languages. They are very good at teaching you authentic pronunciation and a manageable amount of vocabulary. ⑤ Various computer-aided courses are available on CD-ROMs and DVDs. Each course is different but they generally include dialogues, audio, exercises and tests. Some also include phrasebooks, dictionaries, videos, games and provide online and/or telephone support. The traditional courses are designed for（）
企业经营国际化
贯穿螺栓上紧的正确次序是（）
饰物标准：化妆、首饰从简，不能佩带夸张饰物，女员工可佩戴（）
背景资料某安装公司承接一家用中央空调系统安装，该工程安装室外空调机组一个，型号采用RAS-1112HRN5Q；室内机2个，型号分别采用RPIZ-45HRNC/P和RPIZ-36HRNC/P；制冷剂采用R410A；管材采用精密专用铜管，风口采用塑钢双层百叶风口。制冷系统进行气密性试验，在试验压力下保持24小时，前6小时压力降不得大于（）MPa，后18小时除外界环境影响误差外，压力无变化为合格。
某班主任王老师经常拆阅学生的信件，有一次发现学生乐乐的作业本中夹了一封写有“欢欢收”的信件，王老师顺便拆封阅读了此信。这是乐乐写给欢欢的求爱信，王老师看了十分生气，后来在班会上宣读了此信，同时对乐乐提出了批评。次日乐乐在家留了一张字条后出走。乐乐家长找到王老师理论并要求将乐乐找回，王老师解释说：“我作为教师，对学生进行教育和管理是我的职责，我批评乐乐是为了教育和爱护他。他是从家中出走的，与我的工作没有关系。” 问题：（1）请你依据相关法律法规，判断王老师的哪些做法不正确。 （2）王老师的解释是否正确？为什么？