一元二次方程x2+kx-3=0的一个根是x=1,则k的值为( )
A.2
B.-2
C.3
D.-3
把x=1代入x2+kx-3=0中,得
1+k-3=0,
解得k=2,
故选A.
Mum, please let us, Mary and me, go to Jack’s birthday party tomorrow, ______?
A.can you
B.will you
C.shall we
D.may we
同向剥取