Students will complete the visualdiscrimination exercise from the All Aboard book (new edition p. 6, old edition p. 8) to make sure they focus on details.
学生完成书本上的所有看图说话的练习（新版第6页，老版第8页）。注意一定要注重细节。
2
Using the same rapid visualdiscrimination task, we found that only with more than six hours of sleep did people's performance improve over the 24 hours following the learning session.