2020毕业答辩这不是学习的结束，而是真正的开始答辩人： 指导老师： 论文绪论研究背景研究方法研究结果问题讨论论文总结论文绪论It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the best of times, it was the worst of times; it was the age of wisdom, it was the age of foolishness. It was the epoch of belief, and it was the epoch of incredulity. It was the season of light, and it was the season of darkness. It was the spring of hope, and it was the winter of despair. It was the best of times, it
