碳的反应性是指焦碳与（）等进行化学反应的能力。 CO2。 铁矿石。 碱金属。 硫化物。
社会资本扩大再生产的实现条件是（）。 Ⅰ（v+m）=Ⅱc。 Ⅰ（v+m）>Ⅱc。 Ⅰ（c+v+m）=Ⅰ（c+Δv）+Ⅱ（c+Δv）。 Ⅰ（v+Δv+m/x）=Ⅱ（c+Δc）。 Ⅱ（c+v+m）=Ⅰ（v+Δv+m/x）+Ⅱ（v+Δv+m/x）。
城建监察目的是什么？
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.
1.Paragraph①（） 2.Paragraph②（） 3.Paragraph③（） 4.Paragraph④（） 5.Paragraph⑤（） A. What is the function of audio courses? B. What is the function of flash cards? C. What is the function of traditional courses? D. What are the most useful tools for language learning? E. What is the function of computer-aided courses? F. What can help you a lot with your language learning? 下列选项正确的是（）。 F、D、C、A、E。 C、D、F、A、B。 F、B、D、A、E。 C、F、B、E、D。
掏槽眼应比其它炮眼深（）。 100～150mm；。 200～300mm；。 300～400mm。 400～500mm。
学生小谭写作业的速度比较慢，做作业时注意力不集中，而且注意力很容易被其他轻微刺激所吸引，妈妈为此非常苦恼。这时，我们定出的目标行为是：提高孩子做作业的速度和质量。我们在孩子做作业的地方放上一个钟，让孩子时刻注意到自己做作业的速度，在孩子的手腕上套上一个皮筋，让孩子对自己做好自我督促和惩罚。第一周内每次提前十分钟，给予孩子喜欢的增强物；第二周内要求必须在几点之前（十点）完成所有家庭作业，然后才给予强化；后面要求继续提高，直到孩子做作业的速度达到普通学生做作业的速度。经过一段时间的坚持，孩子的作业速度大大提高，而且一回家就专心地完成作业，不再需要家长的督促和管理。我们采用的方法属于（）
