【单选题】【消耗次数:1】
部分数控系统自诊断能力较差,能够进行诊断的范围有限。该说法( )
正确
错误
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相关题目
【单选题】 计算机数控系统都具有很强的自诊断功能。该说法( )
①  正确
②  错误
【单选题】 不同的数控系统有相同的程序段格式。该说法( )
①  正确
②  错误
【单选题】 数控系统是数控机床的重要部分,它随着计算机技术的发展而发展。该说法( )
①  正确
②  错误
【判断题】 利用报警号进行故障诊断是数控机床故障诊断的主要方法之一。该说法( )
①  正确
②  错误
【单选题】 不同的数控系统,程序号地址码所用的字符相同。该说法( )
①  正确
②  错误
【单选题】 数控机床在加工过程中,能按照数控系统的指令自动进行加工、变速及完成其他辅助功能。该说法( )
①  正确
②  错误
【判断题】 一般数控机床的机械故障诊断方法,可采用所谓的“实用诊断方法”和“现代诊断方法”。该说法( )
①  正确
②  错误
【单选题】 数控系统的组成( )
①  数控程序 、输入输出设备
②  CNC装置
③  可编程控制器
④  主轴驱动装置和进给驱动装置等
⑤  以上内容全选
【单选题】 有些数控系统允许用半径参数R来代替圆心坐标参数I、J、K、编程。该说法( )
①  正确
②  错误
【判断题】 提高数控设备的加工精度,一般通过减少数控系统的控制误差和采用补偿技术来达到。该说法( )
①  正确
②  错误
随机题目
【单选题】 What meaning is referred to if we say the meaning of “dog” is an animal with four legs and a tail, often kept as a pet or trained for work?
①  denotative meaning
②  connotative meaning
③  extended meaning
④  inspired meaning.
【单选题】 What do the following examples indicate? Big, huge; enormous, immense; male, masculine .
①  synonyms
②  antonyms
③  hyponyms
④  collocations.
【单选题】 What is referred to if we say “see a movie, watch a play, look at a picture”?
①  denotative meaning
②  connotative meaning
③  collocations
④  synonyms.
【单选题】 What are two categories of vocabulary?
①  Receptive vocabulary and productive vocabulary
②  innate vocabulary and learned vocabulary
③  familiar vocabulary and unfamiliar vocabulary
④  new vocabulary and old vocabulary.
【单选题】 What are two grammar practice activities?
①  Mechanical practice and meaningful practice
②  Volume practice and communicative practice
③  Interest practice and meaningful practice
④  Mechanical practice and success oriented practice.
【单选题】 What are two broad categories of knowledge?
①  Implicit knowledge and explicit knowledge
②  Obvious knowledge and unobvious knowledge
③  Inductive knowledge and deductive knowledge
④  Refereed knowledge and inferred knowledge.
【单选题】 Which of the following steps are typical for the deductive grammar teaching method?
①  Give examples→explain rules→students do practice activities
②  Authentic language data is provided→induces learners to realize grammar rules→apply the new structure to produce sentences (the inductive method)
③  Explicit rules are give to students→Authentic language data is provided→apply the new structure to produce sentences (the guided discovery method)
④  All of the above.
【单选题】 Which of the following statement is not true?
①  Grammatical competence is essential for communication
②  There is a positive role of instruction for grammar learning
③  Grammar teaching can enhance learner proficiency
④  Grammar learning is completely useless for children.
【单选题】 Which of the following is not grammar presentation method?
①  Deductive method
②  Inductive method
③  Guided discovery method
④  Communicative teaching method.
【单选题】 What is the realistic goal of teaching pronunciation?
①  Consistency
②  Intellegibility
③  Communicative efficiency
④  All of the above.