Introductory Chemistry was taught at Duke University for many years by professor Bonk. One year, two guys took the class and did pretty well on all the quizzes and mid terms. They each had a solid A. These two friends were so confident in going into the final that the weekend before finals week,despite the Chemistry final being on Monday,they decided to go to the University of Virginia to party with some friends.

    They had a great time there. However,with their hangovers(宿醉) and tiredness,they overslept all day Sunday and didn't make it back to Duke until early Monday morning. Rather than taking the final then,they found professor Bonk after the final and explained to him how they missed the final. They told him they went up to the University of Virginia for the weekend and had planned to come back in time to study,but they had a flat tire on the way back and didn't have a spare. So they were late getting back to campus.

    Bonk thought this over and agreed that they could take the final the following day. The two guys,happily and relieved,studied that night and went in the next day at the time that Bonk had told them. He placed them in separate rooms and handed each of them a test booklet. He told them to begin.

    They looked at the first problem which was something simple about solution(溶解).It was worth 5 points. "Cool," they thought,"this is going to be an easy final". They then turned the page. They were unprepared,however,for what they saw on it. The question contained only two words: (95 points) Which tire?

“小组合作，自主探究”是我们学习历史的重要方法，下面是某班同学采用小组合作学习的方法，围绕“探索建设社会主义的道路”这个主题进行了探究，请你参与其中，帮助他们解决问题。

同学们了解到我国在探索建设社会主义的道路时期既有许多成就，也出现了严重失误，并把几个严重失误列举出来：

①人民公社化运动      ②“大跃进”运动     ③“文化大革命”

同学们还通过上网查找资料的途径，找出了以下三张图片：