如图,是象棋盘的一部分,若帅位于点(5,1)上,则炮位于点 ( )
A:(1,4)
B:(4,2)
C:(2,1)
D:(2,4)
If someone spends his or her time, effort and money writing a book, for example, he or she deserves _______ for it.
下面给出了5个式子:①3>0,②4x+3y>O,③x=3,④x﹣1,⑤x+2≤3,其中不等式有( )