分数线
高频考点清单（近5年真题统计）
1. 极限计算：必考洛必达+泰勒展开，记住「e^x-1～x」「ln(1+x)～x」
2. 微分方程：齐次通解+非齐次特解（设y=ax+b）
3. 级数审敛：比较判别法直接背「1/n^p，p>1收敛」
4. 矩阵秩：r(A)+r(B)-n ≤ r(AB) ≤ min(r(A),r(B))
蒙题口诀
暴力复习日程
考试时间节点
报名硬核指南
作文模板（英语二大作文）
标题：Chart Trends in Urban Population
The bar chart clearly illustrates that the proportion of urban residents surged from 30% in 2000 to 70% in 2020. Three driving factors behind this trend are summarized as follows.
Firstly, industrialization has triggered massive labor migration. Secondly, educational resources in cities attract younger generations. Finally, infrastructure upgrades make urban life more convenient.
In conclusion, while urbanization boosts economic growth, policymakers should address overcrowding issues.
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