不定项选择题一直是近年来政治科高考的一大题型,分数比例较重,且较单项选择题难度大.由于四个选肢中“至少有一项是符合题意的,”从数学上计算共有 C_4~1+C_4~2+C_4~3+C_4~4即有15种选法,而且多选、错选、漏选都不得分,所以,对同学们来说,这是一个难题,不仅失分率较高,而且彼此之间也拉开了分数的 The indefinite and multiple-choice questions have been a big problem in the political college entrance examination in recent years. The proportion of scores is heavier and it is more difficult than single-choice questions. Since at least one of the four electives is consistent with the meaning of the questions, mathematically There are 15 kinds of choices for calculating C_4~1+C_4~2+C_4~3+C_4~4, and multiple choices, wrong choices, missed selections are not scored. Therefore, for students, this is a difficult problem. Not only are the scores higher, but they have also scored each other