若4x2+kx+25是完全平方式,则k= _________ .
±20
—Mum, I’m sorry I _____ my English test again, though I tried my best.
—Oh, believe in yourself and you’ll make progress at last.
A.passed
B.failed
C.had
D.took
卡捷贷与理财业务应为互斥业务。