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高考命题者时常会采用“推陈出新”的方式来出题,即对课本或历届高考试题进行“再创造”。今年高考理综全国卷Ⅰ第25题就属此类题。此题是带电粒子在匀强磁场中
The college entrance examination proposition often uses the method of “extracting new ideas” to issue questions, that is, to “recreate” the textbooks or previous examination questions. This year’s 25th title of the National College Entrance Examination I is similar to this. This question is charged particles in a uniform magnetic field