题目

How to prepare for an exam isa big question that you always ask yourself. Here are some tips that may help you.Never fear or hate exam and be confident.Some students study well but still may be much afraid of exams and due to this reason they get upset and won't be able to get marks.【1】You have to be confident and it is of great help for youto gainsuccess.Prepare a good timetable.Prepare a timetable before starting the study.【2】Difficult subjects can be given more time and easier ones less, but most importantly you should spare some time for rest.Select a proper atmosphere for studying若过点的直线与曲线有公共点，则直线的斜率的取值范围为（    ）   A．     B．     C．          D．