Be careful of the dog! It's _______. Keep away from it.
A:gentle
B:aggressive
C:lovely
D:interesting
读下列地图,回答问题。
我国的国家级高新技术产业开发区多依附于大中城市。( )(判断对错)
当某金属变成相应的阳离子时,叙述正确的是( )