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Chasing 100M Daily Users, Duolingo Reconsiders Ads, Paying Influencers, and Its Most Expensive Plan

AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.

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中国民族音乐概论


听民间歌曲之纯朴、悦民间舞蹈之雅俗、品说唱艺术之意味、叹民族器乐之气魄、悟戏曲高台之风骨；大美中华，音乐瑰宝，让我们畅游在民族民间音乐文化的浩瀚宇宙。
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艺术传播


以符号、媒介与文本分析为核心，探讨艺术传播中的艺术符码与审美话语。
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设计语言与心理研究


以感知、符号、色彩与情感心理为线索，探索以人为本的创意设计语言。
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声乐舞台实践


通过角色分析、作品诠释与舞台决策，解决声乐演唱者在歌剧及艺术歌曲舞台实践中的具体问题。
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金融英语


该课程主要面向金融专业高年级本科生及研究生开设，旨在提升学生金融素养和金融实务的操作应用能力。
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研究生生涯发展与规划


面向研究生的生涯规划课程，结合自我探索、职业目标制定与求职实践，帮助实现从专业到职业的过渡。
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积极心理与健康


“积极心理与健康”课程关注人的优势、潜能和美德，提升人的幸福感水平，并促进积极心理品质发挥在维护个体健康方面的重要作用，是对传统病理心理学研究范式的有益补充。
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千百条职业生涯路，如何找到适合我的路？

探寻多元职业路径，帮助学习者找到更适合自己的职业发展方向。
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健康心理学


从心理应激、人格与健康行为出发，学习慢性病心理管理及认知、正念和接纳承诺等心理干预方法。
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医院管理学


医院管理学是一门集医学、管理学、社会学、经济学等学科为一体的应用性课程，目标是培养学生在医院实践中发现问题、分析问题、解决问题的能力，是卫生事业管理学专业的核心课程。
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Beijing University of Civil Engineering and Architecture
自动控制原理


以数学模型、时域与频域分析、根轨迹和校正方法系统研究自动控制系统性能。
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理论力学（B）

以受力、运动和平衡与动力学方程为主线，掌握理论力学分析简单工程问题的基本方法。
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力学模型加工与性能检测


通过设计、加工并检测力学结构模型，理解结构性能、失效与优化方法。
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供暖工程


供暖工程课程讲授建筑供暖系统的热负荷、水力计算，以及散热器、地面辐射和热风供暖系统设计。
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交通运输设备


交通运输设备课程主要讲授五大交通运输方式（公路、铁路、水运、航空和管道）的相关设备基础知识，基本构造和基本工作原理，并介绍现状和未来发展趋势。
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