【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】 The dean of the Philosophy Department requested that the visiting scholar ______ a lecture on the philosopher Sartre.
①  gave
②  give
③  would give
④  had given
【单选题】 It became harder for women married to diplomats(外交家) to _______ their own interests.
①  pursue
②  replace
③  absorb
④  convince
【单选题】 As a result of his hard work, he has gained ______ to the Beijing University.
①  access
②  commitment
③  opportunity
④  reward
【单选题】 Planning so far ahead _____ no sense -- so many things will have changed by next year.
①  made
②  is making
③  makes
④  has made
【单选题】 How can you keep the machine ()when you are away?
①  run
②  to run
③  running
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【单选题】 I hate people who ____ the end of a film that you haven’t seen before.
①  reveal
②  rewrite
③  revise
④  reverse
【单选题】 Since the matter was extremely _____, we dealt with it immediately.
①  tough
②  tense
③  urgent
④  instant
【单选题】 As to who is to be hired, it is the Human Resources Department()has the final say.
①  whose
②  those
③  these
④  that
【单选题】 Twenty people were _______ wounded in the air crash.
①  quickly
②  wrongly
③  bitterly
④  seriously
【单选题】 Evidence came up _____ specific sounds are recognized by babies as young as 6 months old.
①  what
②  that
③  which
④  why