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高考中的一类双变量的恒成立,能成立的综合问题对学生来说总是出现这样或那样的错误,是一难点,因而研究他们的处理方案是必要的。
It is a difficult point for students to always find one kind of bivariate constancy in college entrance examination. The comprehensive problem that can be set up is a difficult point. Therefore, it is necessary to study their treatment plan.