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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 appropriate use of these materials and courses will enable you to learn language（）
下列风景区在安徽省安庆市的有（ ）。
下列选项中，对华盛顿城市描述正确的是（）。
组织
曲线半径为650m的到发线，圆曲线正矢连续差经常保养容许偏差为（）。
在影城建设过程中，放映主管必须及时收集数字放映机、服务器证书及序列号等文件，办理影片密钥申请手续。（）
在我国少数民族中，信仰伊斯兰教的一组民族是（ ）。
许多问题在向客户展示及发表产品时被提出。由于产品符合要求，敏捷项目团队感到困惑。敏捷管理专业人士应如何缓解这种情况？（）
要使前牙排列美观，需注意以下几个方面、除了（）。
厕浴间、厨房聚氨酯防水涂料施工工艺流程中，保护层、饰面层施工前应进行的工序包括（）。