— When did the factory develop the new machine?
— Last year.
A:wanted
B:ordered
C:produced
已知等差数列{an}中,sn为其前n项和,若a1=-3,s5=s10,则当Sn取到最小值时n的值为( )
下列说法中正确的有( )
①±2都是8的立方根,②x33=x,③81的立方根是3,④--83=2.
—I haven't had it yet. However, it good.
城市中最广泛的土地利用方式是( )