📚 Year 13 WJEC Science: Teaching Strategies and Lesson Plan Sharing | Year 13 WJEC 科学：教师教学建议与教案分享
Teaching Year 13 WJEC sciences presents a unique challenge: you are preparing students not only for terminal A Level examinations but also for the transition to university or scientific careers. The WJEC specifications for Biology, Chemistry and Physics demand deep conceptual understanding, strong practical competencies and the ability to synthesise knowledge across topics. This article brings together effective teaching strategies, lesson plan ideas and practical tips shared by experienced WJEC science teachers, aiming to support colleagues in delivering engaging, high-impact lessons.
教授 Year 13 WJEC 科学是一项独特的挑战：教师不仅要帮助学生备战最终的 A Level 考试，还要为他们衔接大学课程或进入科学领域工作打下基础。WJEC 的生物、化学和物理考纲要求学生具有深刻的概念理解、扎实的实验能力以及跨主题整合知识的能力。本文汇集了有效的教学策略、教案创意和资深 WJEC 科学教师的实用建议，旨在帮助同行们打造引人入胜、成效显著的课堂。
1. Understanding the WJEC Specification Demands | 把握 WJEC 考纲的核心要求
Before planning any lesson, revisit the latest WJEC specification for your subject. Pay close attention to the stated assessment objectives: AO1 (knowledge with understanding), AO2 (application of knowledge) and AO3 (analysis, evaluation and experimental skills). In Year 13, units such as WJEC Biology Unit 3 (Energy, Homeostasis and the Environment) or Chemistry Unit 3 (Physical and Inorganic Chemistry) carry significant synoptic weight. Print a copy of the specification content checklist and map each lesson against it to ensure full coverage.
在备每一节课之前，一定要重新翻阅你所教学科的最新 WJEC 考纲。重点关注列出的评估目标：AO1（带理解的知识掌握）、AO2（知识应用）和 AO3（分析、评价与实验技能）。在 Year 13 阶段，像 WJEC 生物单元 3（能量、稳态与环境）或化学单元 3（物理化学与无机化学）等模块都具有很高的综合性。不妨打印一份考纲内容清单，并把每一节课都对应到清单上，确保全面覆盖。
Identify the 'command words' used in mark schemes. Words like 'describe', 'explain', 'evaluate' and 'suggest' require different types of responses, and students often lose marks by writing descriptively when evaluation is needed. Design a starter activity where students match command words with definitions and mark scheme examples. This builds exam literacy early.
要重点关注评分方案中的“指令词”。比如“描述”“解释”“评价”和“建议”等词要求的回答方式各不相同，许多学生就是因为在该做评价时只写了描述而丢分。可以设计一个课堂起始活动，让学生将指令词与其定义和评分范例配对，从一开始就建立应试素养。
WJEC also includes a practical endorsement (for Biology, Chemistry and Physics) that is assessed internally. In Year 13, teachers must ensure that students complete the minimum required practical activities and demonstrate essential competencies such as following procedures safely, making accurate observations and using apparatus skillfully. Keep a tracking grid for each student, noting their progress against the Common Practical Assessment Criteria (CPAC).
WJEC 在生物、化学和物理学科中还设有内部评估的实验操作认可。Year 13 期间，教师必须确保学生完成最低数量的指定实验活动，并展现出安全操作、精确观察和熟练使用仪器等关键能力。建议为每位学生准备一份追踪表，依据通用实验评估标准（CPAC）记录其进展。
2. Effective Lesson Planning for Year 13 Sciences | Year 13 科学课的高效教案设计
A strong Year 13 lesson plan begins with a clear, measurable learning objective tied to the specification. Instead of 'Understand the Krebs cycle', write 'Students will be able to draw and explain the Krebs cycle, stating the products and linking it to oxidative phosphorylation'. Display this objective at the start and revisit it in a plenary exit ticket.
一份优秀的 Year 13 教案始于一个与考纲挂钩、清晰可衡量的学习目标。与其写“理解克雷布斯循环”，不如写“学生能够绘制并解释克雷布斯循环，说出其产物并联系氧化磷酸化”。教师可以在课堂开始时展示该目标，并在结尾的退场票中再次回顾。
Structure your lesson into four phases: connection (retrieval of prior knowledge), concept building (new content through direct instruction or guided inquiry), application (exam-style problems or practical work) and reflection (consolidation and self-assessment). This '4-phase' model prevents cognitive overload and keeps A Level learners focused. For instance, in a Physics lesson on capacitors, start by asking students to recall charge and potential difference definitions before introducing time constant calculations.
可以将课堂划分为四个阶段：联结（提取已有知识）、概念建构（通过直接讲授或引导式探究学习新内容）、应用（标准化试题练习或实验操作）和反思（巩固与自我评估）。这种“四阶段”模式能避免认知过载，让 A Level 学生保持专注。例如，在电容器的物理课中，可以先让学生回顾电荷和电势差的定义，然后再引入时间常数的计算。
Include a 'hinge question' midway through the lesson to gauge whole-class understanding. A well-designed multiple-choice question with distractors that target common misconceptions can quickly tell you whether to move on or re-teach. For example, in Chemistry: 'Which species is the strongest reducing agent? A. Na, B. Na⁺, C. Cl₂, D. Cl⁻' reveals whether students truly grasp oxidation potentials.
在课堂中段设置一个“拐点问题”来探测全班的掌握情况。设计精巧的选择题，其干扰项专门针对常见误区，能迅速告诉你该继续推进还是回头重教。例如，化学课上可以问：“下列哪种物质是最强的还原剂？A. Na，B. Na⁺，C. Cl₂，D. Cl⁻”，这能揭示学生是否真正理解了氧化电势。
3. Differentiated Instruction for Mixed Abilities | 面向混合能力的分层教学
Year 13 science groups often contain a wide ability range — icine to those aiming for a pass. Differentiation is essential. Provide tiered worksheets: 'Core', 'Mastery' and 'Extension' The Mastery sheet removes some scaffolds, expecting students to select and apply equations independently. The Extension sheet presents synoptic problems that cross units, such as linking hydrogen bonding in water to thermal properties and biological significance.
Year 13 的科学班通常能力跨度很大——既有志在申请医学的 A* 目标学生，也有只求及格的学生。分层教学必不可少。可以提供三级工作纸：“基础级”“掌握级”和“拓展级”。基础级工作纸包含结构完整、有提示的问题，所需的关键方程如 ΔG = ΔH − TΔS 已经给出。掌握级则撤去部分支架，要求学生独立选择并应用方程。拓展级则呈现跨单元的综合性问题，例如将水中氢键与其热学性质和生物学意义联系起来。
Use flexible grouping strategically. For practical work, group students heterogeneously so that peers can support each other with apparatus setup and error analysis. For exam practice, group homogeneously by target grade so you can lead focused interventions. Rotate roles within groups — 'technician', 'recorder', 'checker' — to develop transferable skills.
灵活分组也要有策略。进行实验时，可采用异质分组，让学生互相帮助完成仪器搭建和误差分析。进行真题训练时，则可按目标等级同质分组，以便教师进行针对性干预。组内角色要轮换——“实验员”“记录员”“检查员”——以培养可迁移技能。
For struggling learners, create 'knowledge organisers' that condense a topic onto one A4 page with key definitions, diagrams and formulas. For example, an organiser for WJEC Biology Unit 4 (Immunology) can include labelled antibody structures, a flow diagram of humoral vs. cell-mediated response, and definitions like 'antigen' and 'memory cell'. Allow students to use these during low-stakes quizzes to build confidence.
为学习吃力的学生制作“知识压缩包”，将某个主题的核心定义、图表和公式浓缩在一张 A4 纸上。例如，WJEC 生物单元 4（免疫学）的压缩包可以包含标记好的抗体结构图、体液免疫与细胞免疫的流程图，以及“抗原”“记忆细胞”等术语解释。允许学生在低风险小测验中使用这些材料，逐步建立信心。
4. Embedding Practical Skills and Required Practicals | 嵌入实验技能与指定实验
WJEC specifications require students to complete a set of specified practicals and to be able to answer questions on experimental design, variables, control, data presentation and error evaluation. In Year 13, these practicals are more sophisticated — electrophoresis in Biology, redox titrations in Chemistry, and diffraction grating experiments in Physics. Dedicate double lessons to practical work and always integrate theory before and after the hands-on activity.
WJEC 考纲要求学生完成一系列指定实验，并能回答有关实验设计、变量、控制、数据呈现和误差评价的考题。到了 Year 13，这些实验更为复杂——如生物的凝胶电泳实验、化学的氧化还原滴定以及物理的衍射光栅实验。教师应当安排连堂课进行实验，并始终在动手操作前后融入理论讲解。
A common mistake is treating practicals as isolated events. Instead, use a 'flipped lab' approach: pre-lab online videos for preparation, an in-class practical with real-time digital data logging where possible, and a post-lab report that mirrors the WJEC Practical Assessment questions. For instance, when investigating the rate of reaction via iodine clock, students can use temperature probes and data loggers to collect continuous temperature data, then plot Δ(1/time) vs. 1/T to calculate activation energy Eₐ.
一个常见误区是把实验当成孤立事件。更好的做法是采用“翻转实验室”模式：课前的线上视频用于预习，课堂实验尽可能使用实时数字数据采集，实验报告则仿照 WJEC 实验评估题的形式编写。比如，用碘钟反应研究速率时，学生可以利用温度探头和数据记录仪连续采集温度数据，然后绘制 Δ(1/时间) 对 1/T 的图像来计算活化能 Eₐ。
To prepare students for the practical exam or practical-based questions, create 'practical scenario' cards. Each card describes a flawed experimental method — e.g. 'A student measured the initial rate of an enzyme reaction but forgot to pre-incubate the enzyme and substrate at the correct temperature.' Students identify errors, suggest improvements and justify their answers. This hones AO3 skills effectively.
为准备实验考试或实验类考题，可以设计“实验情景”卡片。每张卡片描述一个有缺陷的实验方法——例如“某学生测量了酶促反应的初速率，但忘记在正确温度下预温酶和底物”。学生需要找出错误、提出改进方案并说明理由，这样能高效打磨 AO3 技能。
5. Formative Assessment and Feedback Techniques | 形成性评价与反馈技巧
Effective feedback in Year 13 science goes beyond grades. Use comment-only marking for key assignments, providing a 'What went well' (WWW) and 'Even better if' (EBI) statement linked to the mark scheme. For example, in a Genetics essay, EBI might read: 'Include a Punnett square showing the F₂ generation cross to support your explanation of 9:3:3:1 ratio.' Students then act on this feedback in a dedicated reflection time (DART).
Year 13 科学的有效反馈不能止步于分数。在批改重点作业时采用纯评语方式，结合评分标准给出“优秀之处” (WWW) 和“改进之处” (EBI)。比如，在一篇遗传学申论中，EBI 可以写：“引入一个展示 F₂ 代杂交的庞纳特方格，以支持你对 9:3:3:1 比率的解释。”然后安排专门的反思改进时间 (DART) 让学生据此行动。
rate mini whiteboards for rapid whole-class assessment. Pose a calculation problem such as 'Calculate the pH of a 0.100 mol dm⁻³ solution of weak acid HA with Kₐ = 1.74 × 10⁻⁵' ves immediate visibility of misconceptions and prevents students from feeling singled out.
利用迷你白板进行快速的整班评估。出一道计算题，例如“计算 0.100 mol dm⁻³ 弱酸 HA 溶液的 pH，其 Kₐ = 1.74 × 10⁻⁵”，让学生同时举起答案。这能立即暴露误区，又避免了单个学生被盯上的尴尬。
Use technology like online quiz platforms (with teacher accounts) to set low-stakes, auto-marked multiple-choice quizzes after each topic. Analyse the commonly missed questions and plan a re-teach session around them. For example, data might show that 60% of students confused NMR chemical shift values for aldehydes and ketones, prompting a focused mini-lesson on spectroscopy.
利用在线测验平台（教师版）布置低风险、自动评分的选择题小测，覆盖每个主题。分析集中出错的题目，并据此设计一次重教课。比如，数据可能显示 60% 的学生混淆了醛类和酮类的核磁共振化学位移值，那么就可以安排一节针对光谱学的微课堂。
6. Developing Exam Technique and Command Words | 培养应试技巧与指令词解读
From the first week of Year 13, familiarise students with the layout and language of WJEC past papers. Dedicate a 'question deconstruction' session where pairs of students take a question, highlight command words, underline key scientific terms, and write a brief plan before answering. Display anonymised answers on the visualiser and ask the class to assess them using a simplified mark scheme.
从 Year 13 第一周起，就要让学生熟悉 WJEC 历年真题的排版和语言。专门安排一节“题目拆解课”，让学生两人一组，领取一道题，标出指令词、划出关键科学术语，先写出简要提纲再作答。利用实物投影仪展示匿名答案，让全班根据简化的评分标准进行互评。
Create a 'Command Word Wall' in your lab that stays up all year. On each card, write the command word (e.g., 'Evaluate'), a short definition ('Judge from available evidence, giving both strengths and limitations') and a model sentence starter. Refer to it during every practice. For 'Compare' questions, train students to use comparative phrases such as 'whereas', 'in contrast to' and 'similarly', rather than writing two separate descriptions.
在实验室里设置一面“指令词墙”，让它常年可见。每张卡片上写下指令词（如“评价”）、简短释义（“基于现有证据作出判断，同时给出优点与局限”）和一句示范开头句。每次练习时都引导学生参考该墙。对于“比较”类题目，训练学生使用“而”“相比之下”“类似地”等对比性短语，而不是分开写两段描述。
JEC Chemistry, questions requiring students to interpret Gibbs free energy and spontaneity — ΔG = ΔH − TΔS — of ΔG. Set a 6-minute timer for a 6-mark question on this topic to build time management.
针对最难的题型进行限时训练。WJEC 化学中，经常出现要求学生解释吉布斯自由能和自发性的题目（ΔG = ΔH − TΔS）。要反复训练 ΔG 的正负和大小所代表的意义。可以就这个主题设置一道 6 分题，用 6 分钟计时器练习，以培养时间管理能力。
7. Integrating Synoptic Thinking Across Topics | 跨主题的综合思维整合
WJEC A Level science papers heavily feature synoptic questions that link different units. For Biology, a question might connect photosynthesis (Unit 3) to nitrogen cycles and ecosystems (Unit 3 and Unit 4). Start each term with a concept map exercise where students individually draw links between previous and upcoming topics, then share and compare. This makes connections visible.
WJEC A Level 科学试卷中综合性题目占比很大，这类题目常常串联起不同单元。生物考试可能会把光合作用（单元 3）与氮循环和生态系统（单元 3 和单元 4）联系起来。每学期开始时，安排一次概念图活动，让学生独立画出已学主题与新课主题间的联系，然后分享讨论，让关联网络可视化。
Design bridging assignments that require students to apply knowledge from one topic to another. For instance, 'Explain how understanding of protein structure (Unit 1) helps us to design drugs that inhibit HIV protease (Unit 4).' This demonstrates the cumulative nature of the course and rewards students who maintain their prior knowledge.
设计衔接性作业，要求学生将一个主题的知识应用于另一个主题。例如，“解释对蛋白质结构的理解（单元 1）如何帮助设计抑制 HIV 蛋白酶的药物（单元 4）”。这体现了课程的累积性，并能奖励那些持续回顾旧知的学生。
In lessons, use 'synoptic flashcards' where the front shows a scientific concept (e.g., 'Enzyme inhibition') and the back lists cases from different units (e.g., 'Potassium cyanide inhibiting cytochrome oxidase in respiration (Unit 3)', 'Penicillin inhibiting transpeptidase in cell wall synthesis (Unit 4)'). Encourage students to create such cards as their own revision resource.
在课堂上使用“综合闪卡”，正面写一个科学概念（如“酶抑制”），背面则列出不同单元中的实例（如“氰化钾抑制呼吸作用中的细胞色素氧化酶（单元 3）”“青霉素抑制细胞壁合成中的转肽酶（单元 4）”）。鼓励学生自制这类卡片，作为复习资料。
8. Utilising Digital Tools and Online Resources | 善用数字工具与线上资源
Technology can enrich science teaching significantly when used purposefully. Virtual lab simulators, such as those for PCR or mass spectrometry, allow students to visualise molecular processes and collect 'data' even when physical equipment is limited. Set pre-lab tasks using these simulators so in-lab time is maximised for hands-on skills.
有目的地使用技术能大大丰富科学教学。聚合酶链式反应 (PCR) 或质谱等虚拟实验室软件能让学生直观地看到分子过程并收集“数据”，特别是在实物设备不足的情况下。可以用这些模拟程序布置预习任务，让实验室时间最大化地用于动手操作。
Interactive presentation tools with embeddable quiz questions let you pause during direct instruction and check understanding instantly. Use slow-reveal diagrams where students predict the next step — for example, progressively revealing an action potential graph and asking 'What happens at this point to sodium ion channels?' This maintains engagement and deepens processing.
可嵌入小测题的互动演示工具，使得你在直接讲授时可以随时停顿、即时检测理解。使用逐步显示的图解让学生预测下一步——例如，逐段展示动作电位图表并提问“此时钠离子通道发生了什么？”。这能持续抓住注意力并深化认知加工。
Promote digital collaboration through shared online documents where students co-construct a glossary for a topic, contribute real-world science news links, or peer-review each other's essay plans. Set clear protocols: entries must be in students' own words and referenced if quoting. Monitor the document and give praise or corrections as comments.
利用在线共享文档促进数字化协作，让学生共同构建某一主题的术语表、分享现实生活中的科学新闻链接，或互相审阅彼此的申论提纲。设定明确规范：条目必须用自己的话表述，引用须注明出处。教师不时查阅文档，以批注形式给予表扬或纠正。
9. Supporting Independent Study and Revision | 支持自主学习和复习
Year 13 students should be taking increasing responsibility for their learning. Teach them explicit study strategies like retrieval practice, spaced learning and interleaving. Model this by starting each lesson with 'Brain Dump': students write everything they remember about a previous topic in 3 minutes, then check against their notes. This strengthens long-term memory.
Year 13 学生应该对自己的学习承担更多责任。教会他们明确的自主学习方法，如检索练习、分散学习和交错练习。教师可以以身示范：每节课开始时进行“大脑清空”——学生用 3 分钟写下关于上一个主题的所有记忆内容，再对照笔记检查。这能巩固长期记忆。
Provide a structured revision timetable template that maps the weeks leading to exams against all WJEC units. Advise students to schedule 'high-intensity' subjects like Organic Chemistry or Mechanics for their peak concentration times. Encourage the use of the Pomodoro technique (25 minutes focused work, 5-minute break) to maintain stamina.
提供一份结构化的复习时间表模板，将考前周数对应到每一个 WJEC 单元。建议学生把有机化学或力学等“高强度”科目安排在注意力最集中的时段。推荐使用番茄钟法（25 分钟专注 + 5 分钟休息）来保持精力。
Create a bank of 'revision grids' containing 36 short-answer questions per topic, with answers on the back. Students roll a dice to select a question and answer it without notes. This gamifies revision and covers a broad range of content quickly. For example, a Physics grid on fields could ask: 'Define gravitational field strength', 'State Coulomb's law in words', 'Sketch the electric field lines for a negative point charge'.
建立一个“复习网格”题库，每张网格包含一个主题下的 36 道简答题，背面附有答案。学生掷骰子选题，不许看笔记作答。这样增加了复习的游戏性，并能快速覆盖大量内容。例如，物理关于场的网格题可以问：“定义引力场强度”“用文字陈述库仑定律”“画出负点电荷的电场线”。
10. Addressing Common Misconceptions in Year 13 Science | 纠正 Year 13 科学中的常见误区
ve that a catalyst raises the equilibrium yield of an exothermic reaction or that exothermic reactions always occur spontaneously. Address these head-on with evidence-based demonstrations and thermodynamic calculations. Use the equation ΔG = ΔH − TΔS to show that a reaction with a positive ΔH can still be spontaneous if ΔS is sufficiently positive and temperature T is high.
有些误区会一直延续到 Year 13，如果不直接纠正，会严重影响成绩。在化学中，许多学生错误地认为催化剂能提高放热反应的平衡产率，或者放热反应总是自发进行。应当用基于证据的演示实验和热力学计算直击这些误区。借助方程 ΔG = ΔH − TΔS 说明，即使 ΔH 为正，只要 ΔS 正值够大且温度 T 足够高，反应仍可自发进行。
In Physics, confusion between 'voltage' and 'energy' is common. Reinforce the definition: potential difference is energy transferred per unit charge. Use the analogy of a waterfall: height (potential difference) vs. volume of water (charge) vs. total energy (GPE converted). Ask students to explain why a 12V car battery can deliver much more total energy than a 12V torch battery, linking to capacity (charge).
在物理中，“电压”与“能量”的混淆也很常见。要反复巩固定义：电势差是单位电荷转移的能量。可以借用瀑布类比：高度（电势差） vs. 水量（电荷量） vs. 总能量（重力势能转化量）。让学生解释为何 12V 汽车蓄电池能输出比 12V 手电筒电池多得多的总能量，并联系到容量（电荷量）上。
In Biology, students often think that respiration is breathing or that anaerobic respiration in animals produces ethanol. Use a 'Myth Buster' starter: project statements and students vote true/false, then discuss. Compile a class misconceptions logbook that is reviewed periodically, turning errors into learning opportunities.
在生物中，学生常以为呼吸就是喘气，或动物无氧呼吸会产生乙醇。可以做一个“辟谣”热场：投影一系列陈述，让学生投票真或假，然后展开讨论。建立一本全班误区日志，定期回顾，把错误变成学习契机。
11. Collaborative Teacher Sharing and CPD | 教师协作分享与持续专业发展
Teaching Year 13 WJEC science can feel isolating, but collaboration yields rich rewards. Establish a subject-specific professional learning community (PLC) within your school or across local schools. Meet monthly to share successful lesson sequences, co-plan challenging topics like genetic engineering or NMR spectroscopy, and moderate practical assessment standards.
从事 Year 13 WJEC 科学教学有时会感到孤军奋战，但协作能带来丰硕的回报。可以在校内或跨校建立一个学科专业学习社区（PLC）。每月聚会一次，分享成功的课程序列，共同备课（如基因工程或核磁共振波谱等难点章节），并校准实验评估的评分标准。
Create a shared digital repository for high-quality resources — exam question banks tagged by unit and command word, interactive simulations, and common practical worksheets. Ensure all materials are reviewed against the latest WJEC specification and clearly labelled with the relevant assessment objective. This saves planning time and raises consistency.
建立一个共享数字资源库，收录高质量资料——按单元和指令词标注的真题题库、互动模拟程序、通用实验工作纸等。确保所有材料都经过对照最新 WJEC 考纲的审核，并清楚标明对应的评估目标。这能节省备课时间并提升教学一致性。
Encourage peer observation with a focus on a specific element, such as 'questioning for metacognition' or 'practical classroom management'. After the observation, the observer provides non-judgemental, evidence-based feedback. This develops a culture of trust and continuous improvement. Also, attend WJEC INSET training or online webinars for updates on assessment.
鼓励以特定主题为焦点的同行观课，比如“促进元认知的提问技巧”或“实验课堂管理”。观课后，观课者提供不带评判的、基于事实的反馈。这能营造信任和持续改进的文化氛围。同时，教师也应参加 WJEC 的在职培训或在线讲座，及时获取评估动态。
12. Final Preparation for WJEC A Level Examinations | WJEC A Level 考前冲刺策略
In the final term, shift focus to consolidating knowledge and refining exam technique. Run 'walking-talking mocks', where you complete a past paper with the class, verbalising your thought process for each question. Pause at marking points and stress how examiners allocate marks. This demystifies the exam experience.
学期末段，重心应转到巩固知识和打磨应考技巧上。组织“边讲边做模拟考”，由教师带着全班完成一份真题，边做边说出每道题的思考过程，在得分点处停顿并强调评卷人如何给分。这能消除学生对考试的神秘感。
Schedule individual 10-minute academic mentoring meetings with each student. Discuss their mock paper performance, identifying which command words or topics caused most errors. Co-create a targeted revision plan for the final weeks. For a student struggling with synoptic questions, prescribe specific integrated tasks, like a table comparing cell signalling mechanisms in plants and animals.
为每位学生安排 10 分钟的个别学业指导面谈。讨论模拟考的表现，找出是哪些指令词或主题导致了主要失分，并共同制定最后几周的针对性复习计划。对于综合题吃力的学生，可以布置特定的整合任务，比如绘制比较植物与动物细胞信号传导机制的比较表格。
In the last lesson before the exam, emphasise well-being and practical logistics. Remind students to read the front of the paper, allocate time per mark, and unpack multi-part questions. End with a positive message celebrating their hard work. A calm, confident mindset is as important as subject knowledge.
考前的最后一节课，要把重点放在身心健康和实际应考细节上。提醒学生仔细阅读试卷封面说明、按分数分配时间，并拆解复合题目。最后要以积极的信息结束，肯定他们的努力付出。从容自信的心态与学科知识同等重要。
Published by TutorHao | Science Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图