______ of the teachers in our school is 118 and _____ of them are women teachers.
A:The number, first fourth
B:The number, one fourth
C:A number, first fourth
D:A number, one fourth
①细胞壁 ②细胞膜 ③细胞质 ④细胞核
⑤液泡 ⑥叶绿体 ⑦线粒体.
如图,在四边形ABCD中,已知AB∥DC,AB=DC,在不添加任何辅助线的情况下,请补充一个条件,使四边形ABCD成为矩形,这个条件是____.