锚杆的托板必须紧贴（）并用机械或力矩板手拧紧。 锚杆。 螺母。 巷壁。 衬垫。
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 materials and tools available to help you with your language studies range（）. more definitions, examples of usage, and information about pronunciation, and grammar。 authentic pronunciation and a manageable amount of vocabulary。 phrasebooks, dictionaries, videos, games and provide online and/or telephone support。 from dictionaries to language courses。 in a much easier and more effective way。 beginners or people with only a little knowledge of the language。
木制广告底板的制作首先要求先把木料锯成符合规格要求的木条，并（）。 涂胶。 刷漆。 钉牢。 抛光。
在现代炼铁技术的条件下，炉渣中Al2O3含量不宜超过（）。 10～12%。 13～14%。 14～15%。 15～16%。
简述网络成瘾的症状表现。
某公安派出所副所长曾某和民警刘某前往某村村委会传唤故意杀人犯罪嫌疑人侯某时，遭到侯某的反抗，曾某的手背被侯某用匕首刺伤，侯某逃走。当天下午，有群众举报称，在本村的旧石场见到侯某在吸毒。接报后，曾某带领民警刘某等人前去抓捕。民警赶到时，侯某挥舞匕首不让民警靠近。在朝天鸣枪警告无效的情况下，民警刘某开了一枪击中侯某手部，侯某靠在墙上，匕首掉落其脚旁，刘某上前控制侯某时，侯某弯腰欲拾起匕首，曾某即对侯某双腿各开一枪。以下说法正确的是（）。
