### Chinese: 兰州交通大学3名学生给校领导写信，反映对大学考试的困惑，并提出提高考试难度，变换考试题型，让考试真正体现学生实际水平的诉求。
### English: Three students of Lanzhou Jiaotong University wrote to the school leaders, reflecting their confusion about the university examination, and proposed to improve the difficulty of the examination, change the type of examination questions, and make the examination truly reflect the actual level of students.
### Errors: There is a minor error of incorrect translation is missing content from the correct translation at "the university examination instead of university exams". There is a minor error of incorrect translation has stylistic problems at "proposed to improve instead of proposed to make".

### Improved English: Three students in Lanzhou Jiaotong University wrote a letter to leaders of the university to reflect their confusion on examinations in university, and raised the ideas to increase the difficulty of examinations, change types of questions and let the examinations reflect the real learning level of students.