A new gym ________ in our neighbourhood next year.
A:is built
B:was built
C:has been built
D:will be built
下列句子加线的词语解释有误的一项是 ( )。
若实数m、n满mn>0,且不等式m2+mn≤a(m2+n2)恒成立,则实数a的最小值为( )