截面上的全应力的方向()
D
暂无解析
设A为3阶方阵,其特征值分别为2,1,0则|A+2E|=()
---Haveyoumovedintothenewhouse?---Notyet.Therooms__________.
Thedoctorletthepatients______thesoftmusic,becauseithelpedmakethem_____.
下面属于摩擦性失业情况的是()
Hisbackacheisonly_________fornotwateringtheflowers.