题目

__________the teachers in their school is about 200 and one fourth of them are ____________ teachers. A . A number of; women B . A number of; woman C . The number of; women 答案：C五年级有学生m人，六年级比五年级少3人，两班共有学生（ 　）人．A. m＋3B. m3C. 2m＋3D. 2m3