_________ Henry's mother ________ his father speaks English. They both speak Chinese.
A:Either; or
B:Neither; nor
C:Both; and
D:Not only; but also
下图是N,M两国人口年龄金字塔结构图,关于两类国家人口合理容量的叙述正确的是( )
若关于x的一元二次方程x2+(k+3)x+2=0的一个根是﹣2,则另一个根是( )