【单选题】【消耗次数:1】
平面一般力系有( )个独立的平衡方程,可用来求解未知量。
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相关题目
【单选题】 平面一般力系有( )个独立的平衡方程,可用来求解未知量。
①  1
②  2
③  3
④  4
【单选题】 平面一般力系有( )个独立的平衡方程,可用来求解未知量。
①  1
②  2
③  3
④  4
【单选题】 平面一般力系的平衡方程可以求解()个未知数。
①  1
②  2
③  3
④  4
【单选题】 平面一般力系的平衡方程一般有()个。
①  1
②  2
③  3
④  4
【判断题】 未知量均可用平衡方程解出的平衡问题,称为稳定问题;仅用平衡方程不可能求解出所有未知量的平衡问题,称为不稳定问题。
①  正确
②  错误
【判断题】 在平面力系中,所有力作用线汇交于一点的力系,称为平面一般力系,有3个平衡方程。
①  正确
②  错误
【多选题】 平面一般力系的平衡方程是()
①  所有力在X轴上投影的代数和为零
②  所有力在Y轴上投影的代数和为零
③  所有力对矩心的力矩之和为零
【单选题】 利用平面汇交力系的平衡条件,最多可以求解()个未知力。
①  1
②  2
③  3
④  4
【判断题】 如果有n个物体组成的系统,每个物体都受平面一般力系的作用,则共可以建立3个独立的平衡方程。
①  正确
②  错误
【单选题】 平面汇交力系独立的平衡方程数目是( )。
①  一个
②  三个
③  两个
④  四个
随机题目
【单选题】 What is fluency competence concerned with?
①  Appropriate use of the language in social context
②  Ability to link units of speech together with facility and without strain or inappropriate slowness or undue hesitation
③  Strategies one employs when there is communication breakdown due to lack of resources
④  Knowledge of language itself, its form and meaning.
【单选题】 What is linguistic competence concerned with?
①  Appropriate use of the language in social context
②  Ability to create coherent written text or conversation and the ability to understand them
③  Strategies one employs when there is communication breakdown due to lack of resources
④  Knowledge of language itself, its form and meaning.
【单选题】 What is the possible solution to bridge the gap between classroom language teaching and real-life language use?
①  Task-based teaching and learning
②  Communicative language teaching
③  Presentation, practice and production
④  Engage
⑤  study
⑥  activate.
【单选题】 What is the ultimate goal of foreign language teaching?
①  Enable SS to use the foreign language in work or life
②  Enable SS to achieve accuracy of English language structure
③  Enable SS to achieve fluency of English language structure
④  Enable SS to speak standard English.
【单选题】 What is pragmatic competence concerned with?
①  Appropriate use of the language in social context
②  Ability to create coherent written text or conversation and the ability to understand them
③  Strategies one employs when there is communication breakdown due to lack of resources
④  Knowledge of language itself, its form and meaning.
【单选题】 What qualities are considered good qualities of a good teacher?
①  Kind, humorous, well informed
②  Hard working, disciplined
③  Well prepared, dynamic and patient
④  All of the above
【单选题】 What does the interactional view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A linguistic system and a means for doing things.
【单选题】 What are the characteristics of audio-lingual method?
①  Language is learned by constant repetition and the reinforcement of the teacher
②  Mistakes were immediately corrected, and correct utterances were immediately praised
③  Students should be allowed to create their own sentences based on their understanding of certain rules
④  Both A and B.
【单选题】 What does the structural view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A linguistic system and a means for doing things.
【单选题】 What does the functional view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A a linguistic system and a means for doing things.