Danny did all kinds of things to make the baby .
A:to stop crying
B:stop crying
C:to stop to cry
D:stop to cry
There are months in a year. month is December.
如图所示,A是铁棒,B是小磁针,用磁铁的N极靠近铁棒,发现小磁针原靠近铁棒下端的一极被排斥,而另一极被吸引过来.分析这一现象可知,下列符合实验事实的是( )