一定质量的水全部结成冰,体积比原来( )
A:增大110
B:减小110
C:增大19
D:减小19
--- gloves are these?
--- They look like Mike's. You can ask him.
Amy has_________
如图所示,已经画出了两个磁极间的磁感线,两个磁体的A端为____极,B端为____极。