经海关免税放行的物品,内如出售、转让或移作他用,必须报经海关并补缴税款( )。
A.一年
B.两年
C.半年
D.三个月
参考答案:B
一个圆柱形水桶,里面盛48升的水,正好盛满,如果把一块与水桶等底等高的圆锥形,放入水中,桶内还有______升水.
It never occurred to me _____ you could succeed in persuading him to change his mind.
A.which
B.that
C.what
D.if