一天,学校对初三年级的学生进行体育测试。操场上,老师们调试着测试器材,学生们做着准备活动,操场周围站满了前来为自己孩子加油助威的家长。四百米跑虽然难度不大,但对于平时缺乏锻炼的学生来说,则是一次艰难的检测。操场上的跑道是一圈两百米,参加测试的学生需要沿着跑道跑两圈。第一组参加测试的学生走向起跑线, One day, the school conducted a physical examination of students in the third grade. On the playground, the teachers tested the test equipment, the students were preparing for the activity, and the playground was filled with parents who came cheering for their children. Although the difficulty of running for a 400-meter run is not great, it is a difficult test for students who lack exercise routine. The playground track is two hundred meters in length, and students taking the test run two laps along the track. The first group of students to take the test to the starting line,