题目

The person who ________ advantage of the girl ________ a disadvantage didn’t gain an advantage  ________ her . A．made; in ; over B．took; at ; on          C．took; at; over       D．made; at; over 答案：C已知函数在区间上单调递增，那么实数的取值范围是（    ） A. B. C. D.