青书学堂: (单选题) 箱形截面外伸梁，梁有图示的两种放置方式，在对称弯曲的条件下，两梁的 有如下4种关系：正确答案是( )： https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/64474b93-2628-4145-be06-1d05048958cd.gif,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/b0bcde3c-425d-41b6-8b5d-afaf2cf3292f.gif

青书学堂: (单选题) 箱形截面外伸梁，梁有图示的两种放置方式，在对称弯曲的条件下，两梁的 有如下4种关系：正确答案是( )： https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/64474b93-2628-4145-be06-1d05048958cd.gif,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/b0bcde3c-425d-41b6-8b5d-afaf2cf3292f.gif

青书学堂: 甲乙两个车间工人日加工零件数的均值和标准差如下: 哪个车间日加工零件的离散程度较大: https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/4d3d76e6-c223-4d08-8962-f3f91cd8e8f1.jpg,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/staticQuestionImg/3ddc4313-2181-4cde-9100-73dc4a850922.jpg

青书学堂: (填空题) 设随机变量,则___. https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/15160697492918c1cb372bdd24f8d8083933f84551ca5image27.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1516069749405a50216da00434fd6b73d926fe3aff644image28.png

青书学堂: 对矩阵A作如下的Doolittle分解： ，则的值分别为2，2。（  ） https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/153181599162517f380c797ed4647bdd48e76fb4920a1image32.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991695ad5ca644c1354bd8a62827a3a347ebacimage33.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991766e071845b1044436990ce23b60e1da1bcimage34.png,https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1531815991837fca60c6e252e4f048ec6a4806e247214image35.png