当x取相反数时,代数式b2x2+|a|对应的值也为相反数,则ab等于( )。
0
(2011·杭州).如图所示,一个接有电源的螺线旁有甲、乙两个软铁片(在磁场中能够被磁化),当开关闭合后 ( D )
A.甲、乙左端都是N极
B.甲、乙右端都是N极
C.甲右端是N极,乙左端是N极
D.甲左端是N极,乙右端是N极
Most importantly, parents should choose correct ways to ________ their children.
A.bring up
B.bring down
C.bring in
D.bring out