Thereareoversix________students_____partintheentranceexaminDongchengonMaythesecond.

Thestormdiedawayatlastwiththegoldenwaves__________theshoreinpeace.

设3阶实对称矩阵A的特征值分别为2,1,0，则()

Youshouldtrytowrite__________evenwhenyou’rebusy.Asyouknow,practicemakesperfect.

设3元非齐次线性方程组Ax=b有解α1，且r(A)=2，则Ax=b的通解是