分解因式:12x3y-18x2y2+24xy3=6xy(______).
原式=6xy(2x2-3xy+4y2),
故答案为:2x2-3xy+4y2.
人被生锈的铁钉扎破脚后,注射破伤风抗毒素即可避免破伤风,这种免疫属于()
()her and then try to copy what she does.
A.Watch
B.See
C.Mind
D.Stare at