第三课的全面考试。问题会从测验3.1和3.2和3.3随意选取。每一个问题值一分，就是它有多数答案也是如此。时间:25分钟。
Time limit: 25 mins
Grading method: First attempt
Sorry, guests cannot see or attempt quizzes
Would you like to log in now with a full user account?