一、背景在高考数学全国新课标卷中,选修4-4:坐标系与参数方程历来都以解答题的形式进行考查,笔者经过调查发现,大部分学校主攻选修4-4,同时兼顾选修4-5:不等式选讲,有的学校甚至只攻选修4-4.究其原因,主要有以下两个方面:(1)受时间限制,部分学校集中精力只攻三个选考题中的一个; First, the background In the college entrance examination mathematics nationwide new curriculum standard, elective 4-4: coordinate system and parametric equation has always been to answer questions in the form of examination, the author after the survey found that most of the main elective 4-4 schools, taking into account the elective 4-5: Inequality, some schools even attacked only 4-5. The reason is mainly due to the following two aspects: (1) Due to time constraints, some schools have focused their efforts on only one of the three selected exams ;