A:a>c>b
B:c>a>b
C:a>b>c
D:c>b>a
下列关于飞机能腾空而起的说法错误的是( )
如图所示,在探究通电螺旋管外部的磁场分布实验中,观察到小磁针指向正确的是( )
The Internet is very useful. We can get a lot of ________ from it.