_______ the teachers in the school is one hundred, and ______ of them are women teachers.
A:The number of;four-fifths
B:A number of;four-fifth
C:A number of;four-fifths
D:The number of;four-fifth
读下图,此图显示我国古代经济重心的南移经历了一个漫长的过程,与图中第③处对应的时期是( )
① ② ③