词汇是英语学习的基础。只有具备了一定的词汇量才能进行外语的听、说、读、写、译训练。根据《大学英语教学大的要求,大学英语词汇的学习大致可以分为三个重要阶段:即四级,六级,六级后阶段。四级词汇是4200
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