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充分条件和必要条件作为高中数学重要的知识点,相关考题几乎在每年各地区的高考卷中都会出现.现仅对选择、填空题,将近三年的考查情况作初步统计,
Sufficient conditions and necessary conditions are important knowledge points for senior high school mathematics. Related questions will appear almost every year in the college entrance examination papers. For the selection and blank-in questions only, preliminary statistics on the examination results for the past three years will be provided.