There are three books in the bookstore.( )
A:thousand
B:thousands
C:thousands’
下图是我国某地新开辟的自然风景区示意图,据图,完成下面小题。
设m∈1,2,3,4,n∈-12,-8,-4,-2,则函数fx=x3+mx+n在区间1,2上有零点的概率是( )