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 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 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.
论文绪论 研究背景 研究方法 研究结果 问题讨论 论文总结
