我认为应该不是紧张导致的11个学生平时成绩很好然后psle一起紧张的概率太小了 我更相信是阅卷人对用方程解答评分较为严格 注意给分的条件是：any solution which demonstrates the correct understanding and application of mathematical concepts and skills as requested by the question 这个条件其实蛮主观的。