—I haven't had it yet. However, it good.
A:tastes
B:smells
C:sounds
D:feels
已知,线段AB=3cm,⊙A的半径为4cm,若⊙A与⊙B相切,则⊙B半径为____cm.
关于下列说法,不正确的是( )
弹奏小提琴时,要使小提琴发出的声音听起来音调高些,应采取的措施是( )