I'm the mother of a fourteen-year –old . I have a rule for my daughter :be among the top of 5 students or get punished in one way or another . She has been doing very well in school ,but some of my friends keep telling me that I put too much pressure on her .Am I wrong ?

写作要点：1）表明自己的看法。

2）陈述自己的理由。

3）提出至少2条建议。

下图为我国某省（区）夏季与冬季气温日变化平均状况示意图，读图回答下列各题。

某种药品原价为64元/盒，经过连续两次降价后售价为49元/盒．设平均每次降价的百分率为x，根据题意所列方程正确的是（　　）

设常数a∈R，集合A={x|（x﹣1）（x﹣a）≥0}，B={x|x≥a﹣1}，若A∪B=R，则a的取值范围为（　　）