Vocabulary; Vocabulary test; Level-based teaching.
词汇量；词汇量测试；分层教学。
At present, many universities including Tsinghua University are implementing level-based teaching for core courses.
目前，包括清华大学在内的许多高校都在进行基础课程的分级教学。
Based on the primary level of chemistry, the comprehensive chemical experiments are an important part of the new experimental teaching system of chemistry.
综合化学实验是建立在化学一级学科层面上，化学实验教学新体系的重要组成部分。
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