单选题:The text helps us to know more about teenagers' 题目分类:公共英语二级 题目类型:单选题 查看权限:VIP 题目内容: The text helps us to know more about teenagers' A.daytime activities B.sleeping habits C.mental problems D.studying methods 参考答案: 答案解析:
函数f(x)=(2-m2)x+m在区间[0,1]上恒为正,则实数m的取值范围是( ). 函数f(x)=(2-m2)x+m在区间[0,1]上恒为正,则实数m的取值范围是( ).A.-1<m<2 B. C. D.0<m<2 分类:公共英语二级 题型:单选题 查看答案