【判断题】【消耗次数:1】
挠度向下为正,转角逆时针转向为正。
正确
错误
参考答案:
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相关题目
【判断题】 规定位移法的杆端弯矩正负号时,对杆端以顺时针为正,对结点以逆时针为正,这一规定也适合于杆端剪力的正负号规定。
①  正确
②  错误
【判断题】 剪力是截面上应力沿轴线法向的合力,以绕隔离体逆时针转为正。
①  正确
②  错误
【判断题】 截面上的剪力使研究对象有逆时针转向趋势时取正值。
①  正确
②  错误
【多选题】 影响转向器正效率的因素有()。
①  制造工艺;
②  制造质量;
③  结构特点;
④  转向系类型
【单选题】 在下面关于梁、挠度和转角的讨论中,结论正确的是:( )。
①  挠度的一阶导数等于转角
②  挠度最大的截面转角最大
③  转角为零的截面挠度最大
④  挠度最大的截面转角为零
【判断题】 截面上的剪力使研究对象有逆时针转向趋势时取正值,当梁横截面上的弯矩使研究对象产生向下凸的变形时(即下部受拉,上部受压)取正值。
①  正确
②  错误
【判断题】 电位器逆时针旋转时,灯泡逐渐变暗。
①  正确
②  错误
【判断题】 在设计转向系时,要求驾驶员松开方向盘后,转向轮可以自动回正。
①  正确
②  错误
【判断题】 主销后倾角有使车轮自动回正的作用,但使转向沉重。
①  正确
②  错误
【简答题】 简述正蹬腿法的易犯错误?
随机题目
【单选题】 ______, this book is not very difficult.
①  Generally say
②  Generally saying
③  Generally speak
④  Generally speaking
【单选题】 This ______,we all went home immediately.
①  did
②  done
③  does
④  do
【单选题】 Johnregretted_______tothemeetinglastweek.
①  not going
②  not to go
③  not having been going
④  not to be going
【单选题】 The weather was terrible outside. She entered the office, her nose ______ with cold.
①  red
②  to be red
③  being red
④  has been red
【单选题】 Body language contains a lot of information. So, ______ your body language
①  be likely to
②  be aware of
③  be friendly with
④  be patient with
【单选题】 A balanced diet is ______ as a quick and effective way to keep in good health.
①  consider
②  considers
③  considered
④  considering
【单选题】 We should not eat or eat less______ food.
①  junk
②  garbage
③  trash
④  rubbish
【单选题】 My brother can take his car apart and put it back together again. I certainly wish he______ me how.
①  would teach
②  has taught
③  will teach
④  teaches
【单选题】 She’s very ______ and would like to see each thing in its place.
①  gathered
②  grouped
③  modernized
④  organized
【单选题】 Keeping eye contact ______ respect for the interviewer and your audience.
①  says
②  pays
③  throws
④  shows