Comprehensive exam 150 minutes to do 300 sub-questions. According to the score distribution, the time for multiple-choice questions should be about 45 minutes, and the time for non-multiple-choice questions should be about 105 minutes, leaving time for investigation. Comprehensive utilization time allocation: 9: 00-9: 50; -Actual completion at 10: 30; -1 1: 05 chemical completion; -biological completion (note: when answering biological subjective questions, you must first complete 40 multiple-choice questions.