近年来,磁偏转问题成为高考的考查热点,如1998年高考的第23题,1999年高考的全国卷及广东卷的压轴题.此类习题具有思维难度大、与几何知识联系多(空间图形)、有周期性、易形成多解等特点,常会使一些学生“望题兴叹”.教师在复习此类问题时要精心选题,加强解法指导.本文向大... In recent years, the problem of magnetic deflection has become a hot spot for the college entrance examination, such as the 23rd title of the 1998 college entrance examination, the 1999 national college entrance exam and the final issue of the Guangdong volume. Such exercises are difficult to think, and are associated with geometric knowledge (spatial graphics ), there are periodic, easy to form multiple solutions and other characteristics, often make some students “expect and sigh.” Teachers in the review of such issues should be carefully selected topics, to strengthen the guidance of the solution. This paper to the big...