Studentsenrolledasfull-timecanfully____intheuniversityextracurricularclubs.
Themanageriscallingona______customertryingtotalkhimintosigningthecontract．
设(I)计算行列式A；(II)当实数a为何值时，方程组有无穷多解，并求其通解
N是偶数吗?
(1).n2-1是奇数。
(2).n0.5是一个整数。
Makesurethattransportationtoandfromtheriverisarrangedtoyour______.
