📚 Year 12 Edexcel PE: High-Frequency Topics and Common Mistakes Analysis | Edexcel 体育高频考点与易错题分析
Mastering Year 12 Edexcel Physical Education means going beyond memorisation – it requires the ability to link theory to sporting examples, interpret data, and avoid the subtle traps that catch out so many candidates year after year. This article breaks down the most frequently examined topics across the AS specification and shines a light on the common mistakes students make, giving you a clear revision roadmap.
掌握 Year 12 Edexcel 体育不仅需要记忆知识点，更要把理论与实践案例相结合、正确解读数据，并绕开每年让无数考生失分的隐形陷阱。这篇文章将逐一拆解 AS 阶段最高频的考点，同时揭示学生最容易犯的错误，为你的复习提供一副清晰的地图。
1. Skeletal Muscle Contraction & The Sliding Filament Theory | 骨骼肌收缩与滑丝理论
The sliding filament theory is a perennial favourite in Section A. Examiners want a step-by-step description of how actin and myosin interact, not just a vague overview. A common mistake is confusing the roles of tropomyosin and troponin. Tropomyosin blocks the actin binding sites at rest, while troponin pulls tropomyosin aside when calcium ions bind to it. Many students state that ‘troponin moves’ when it is actually tropomyosin that shifts position.
滑丝理论是 Section A 常年必考的宠儿。考官希望看到肌动蛋白与肌球蛋白相互作用的分步描述，而不是含糊的概括。一个常见错误是混淆原肌球蛋白和肌钙蛋白的角色。安静状态下，原肌球蛋白遮盖肌动蛋白的结合位点，而肌钙蛋白在结合钙离子后会把原肌球蛋白拉开。很多学生写成“肌钙蛋白移动了”，实际上发生位移的是原肌球蛋白。
Another classic pitfall involves the energy source. Students often write ‘ATP provides energy for contraction’ without specifying that ATP is required for myosin head detachment and recocking, not for the power stroke itself. The power stroke is driven by the release of stored energy when the myosin head tilts after binding to actin. Make sure you sequence the events: calcium release from the sarcoplasmic reticulum → calcium binds to troponin → tropomyosin shifts → cross-bridge formation → power stroke → ATP binds causing detachment → ATP hydrolysis re-energises the myosin head.
另一个经典陷阱是能量来源问题。学生常写“ATP 为收缩提供能量”，却不说明 ATP 是用于肌球蛋白头部的脱离和重新翘起，而非用于发力冲程本身。发力冲程是由肌球蛋白头部与肌动蛋白结合后倾斜时释放的储存能量驱动的。一定要把事件排列清楚：肌质网释放钙离子 → 钙离子与肌钙蛋白结合 → 原肌球蛋白移位 → 横桥形成 → 发力冲程 → ATP 结合导致脱离 → ATP 水解使肌球蛋白头重新蓄能。
2. The All-or-None Law and Motor Unit Recruitment | 全或无定律与运动单位募集
A high-frequency short-answer question asks: ‘Explain the all-or-none law in relation to muscle contraction.’ The correct response is that a motor unit will either contract fully or not at all in response to a stimulus, and that the strength of contraction is varied by recruiting more motor units or by altering the frequency of stimulation (wave summation). The most common error is claiming that individual muscle fibres can produce a partial contraction. They cannot; the graded response of the whole muscle comes from the number and size of motor units activated.
一道高频的简答题问：“结合肌肉收缩解释全或无定律”。正确答案是：一个运动单位对刺激的反应要么完全收缩，要么完全不收缩，收缩强度的变化是通过募集更多运动单位或改变刺激频率（波总合）来实现的。最常见的错误是声称单根肌纤维可以产生部分收缩。它们做不到；整个肌肉的分级反应源于被激活的运动单位数量和大小。
When linking this to sport, students frequently misuse the terms ‘fast-twitch’ and ‘slow-twitch’ motor units. Remember, the motor unit pool is recruited according to the size principle: smaller, oxidative motor units are recruited first for low-intensity activities, and larger, glycolytic motor units are recruited only when needed. A footballer jogging around the pitch relies predominantly on type I motor units; a full sprint requires the additional recruitment of type IIb units. Mistakenly claiming that you ‘switch’ from slow to fast fibres implies that the slow ones turn off, which is not true – they remain active.
当联系运动时，学生常滥用“快肌”和“慢肌”运动单位这两个术语。切记，运动单位池按大小原则募集：较小的氧化型运动单位首先被募集用于低强度活动，较大的糖酵解型运动单位只在需要时才被调用。足球运动员在场上慢跑时主要依赖 I 型运动单位；全速冲刺则需要额外募集 IIb 型单位。错误地声称你从慢肌“切换”到快肌，意味着慢肌被关闭，这并不正确——它们依然保持着活跃。
3. Cardiovascular Drift and Heart Rate Interpretation | 心血管漂移与心率解读
Cardiovascular drift is one of the most poorly explained concepts in the AS exam. Students can state that heart rate gradually rises during prolonged steady-state exercise, but they often fail to correctly attribute the mechanism. The key drivers are: a reduction in stroke volume due to decreased plasma volume (as fluid is lost through sweating), and a redirection of blood to the skin for thermoregulation, which reduces venous return. To maintain cardiac output, heart rate must increase. Do not simply write ‘heart rate increases because you get tired’.
心血管漂移是 AS 考试中被解释得最糟糕的概念之一。学生能说出心率在长时间稳定强度运动中逐渐上升，但往往无法正确归因其机制。关键驱动因素是：由于血浆容量因出汗丢失而减少，导致每搏输出量下降，加上血液被重新分配到皮肤用于体温调节，使得静脉回流量下降。为了维持心输出量，心率必须升高。不要仅仅写“因为累了所以心率上升”。
A related error appears in data-response questions. Given a graph of heart rate during a 45-minute steady run showing a rise from 145 bpm to 162 bpm, students often mislabel this as a failure of the cardiovascular system. It is a normal physiological response. In your answer, always define cardiac output (Q̇ = HR × SV), explain that SV decreases due to reduced plasma volume, and state that HR compensates. Add a sporting example: a distance runner experiences cardiovascular drift after 30 minutes, which can affect performance if pacing is not adjusted.
一个相关的错误出现在数据分析题中。给出一张 45 分钟匀速跑心率图，心率从 145 bpm 升至 162 bpm，学生常错误地将这称为心血管系统失灵。这其实是正常的生理反应。在你的答案中，一定要先定义心输出量（Q̇ = HR × SV），解释因血浆容量减少导致 SV 下降，而 HR 进行代偿。添加一个运动实例：一名长跑运动员在 30 分钟后经历心血管漂移，如果不调整配速就会影响表现。
4. Oxygen Dissociation Curve and the Bohr Shift | 氧离曲线与波尔效应
The oxygen dissociation curve is routinely examined, and the common mistake is failing to relate the curve’s S-shape to haemoglobin’s cooperative binding. The first oxygen molecule binds with difficulty (shallow initial gradient), which then changes the quaternary structure of haemoglobin, making subsequent oxygen binding easier (steep middle). The plateau shows that at high partial pressures (lungs), haemoglobin is nearly saturated. When asked about the Bohr shift, students often correctly state the curve moves right but cannot justify why: increased carbon dioxide and hydrogen ions from working muscles lower the pH, which reduces haemoglobin’s affinity for oxygen, enhancing unloading of oxygen to the tissues.
氧离曲线常常被考到，常见错误是未能将曲线的 S 形与血红蛋白的协同结合联系起来。第一个氧分子结合困难（初始梯度平缓），这改变了血红蛋白的四级结构，使得后续氧分子结合更容易（中间陡峭）。平台部分表明在高氧分压（肺部）时血红蛋白几乎达到饱和。当被问及波尔效应时，学生往往能正确说出曲线右移，却无法解释原因：运动中肌肉产生的二氧化碳和氢离子增加，降低 pH 值，从而降低血红蛋白对氧气的亲和力，促进氧气向组织的释放。
A tricky multiple-choice item might ask what happens to the curve during a cool-down at altitude. Remember: altitude causes a rightward shift initially due to hypoxia-induced increase in 2,3-DPG, but chronic adaptation increases haemoglobin concentration, not affinity. Students mix up acclimatisation and immediate responses. Be precise: the Bohr shift is a short-term local effect; increased 2,3-DPG is a slower adaptation. Both reduce affinity and shift the curve right. Always highlight the benefit: greater oxygen release to active muscles where it is most needed.
一道刁钻的选择题可能会问：在高海拔进行整理活动时曲线会怎样？记住：高海拔下由于缺氧导致 2,3-DPG 升高，初始会引起曲线右移，但长期适应会增加血红蛋白浓度，而非亲和力。学生们常会混淆习服与即刻反应。要精确：波尔效应是一种短期局部效应；2,3-DPG 的增加是较慢的适应。两者都会降低亲和力并使曲线右移。始终点出好处：将更多氧气释放到最需要的活动肌肉中。
5. Energy Systems: ATP-PC, Glycolytic and Aerobic Interplay | 能量系统：ATP-PC、糖酵解和有氧供能的交互
Questions on energy systems often demand an analysis of their contribution in team sports like football or hockey. The common error is treating the three systems as sequential, like a relay race. In reality, all three systems contribute from the start of exercise, but the proportion of ATP resynthesised by each pathway changes over time and intensity. The ATP-PC system dominates for 0–8 seconds of maximal effort; the glycolytic system peaks around 30–40 seconds; the aerobic system becomes the primary supplier after 2 minutes. Do not say ‘the lactic acid system takes over’ – it is a smooth continuum.
关于能量系统的题目通常要求分析它们在足球或曲棍球等团队项目中的参与比例。常见错误是将三个系统当成接力赛一样依次更替。实际上，从运动一开始三个系统就同时参与，只是各自再合成 ATP 的比例随时间和强度变化。ATP-PC 系统在 0–8 秒最大用力中占主导；糖酵解系统在 30–40 秒左右达到高峰；有氧系统在两分钟后成为主要供能者。不要说“乳酸系统接管了”——这是一个平滑的连续统。
Another trap is misunderstanding the fate of lactic acid. Lactate is not a waste product – it can be oxidised by the heart and slow-twitch fibres as fuel, or reconverted to glucose in the liver (Cori cycle). When describing the onset of the glycolytic system, mention that pyruvate is converted to lactate due to a lack of oxygen, but underline that this also regenerates NAD⁺, allowing glycolysis to continue. Avoid the outdated term ‘oxygen debt’ unless you also clarify the modern concept of EPOC (excess post-exercise oxygen consumption) and its fast and slow components.
另一个陷阱是误解乳酸的命运。乳酸不是废物——它可以被心肌和慢缩肌纤维氧化用作燃料，或在肝脏中重新转化为葡萄糖（科里循环）。当描述糖酵解系统的启动时，要提到丙酮酸因缺氧而转化为乳酸，但同时强调这也再生了 NAD⁺，使糖酵解得以持续。除非你同时阐明现代概念 EPOC（运动后过量氧耗）及其快、慢组分，否则不要使用过时的“氧债”一词。
6. Skill Classification and Transfer in Sport | 运动技能分类与迁移
A favourite exam question asks students to classify a somersault or a tennis serve across multiple continua and justify each choice. The classic errors include classifying a diving save by a goalkeeper as a closed skill. It is actually an open skill because it is significantly affected by the unpredictable flight of the ball. Similarly, a vault in gymnastics is often mislabelled as externally paced – it is internally paced and closed because the performer controls the initiation. Always link your classification to the environmental predictability and the performer’s control over timing.
一道考卷偏爱的问题要求学生沿多条连续体对空翻或网球发球进行技能分类，并给出理由。经典错误包括将守门员的扑救归类为闭锁式技能。它实际上是一种开放式技能，因为它深受不可预测的球的飞行路线影响。同理，体操中的跳马常被错标为由外部节奏支配——它属于内部节奏且是闭锁式，因为运动员主导着动作的启动。永远要将你的分类与环境可预见性以及运动员对时机的控制相结合。
Transfer of learning is another hotspot. Students need to distinguish between positive, negative, zero, bilateral, and proactive/retroactive transfer. The mistake is to confuse bilateral transfer with positive transfer. Bilateral transfer refers specifically to skill transfer from one limb to the other (e.g., learning a lacrosse shot with your right hand improves the left). It can be positive or negative. When a badminton player who uses a lot of wrist learns squash, the similar wrist action may produce negative transfer if the squash shot requires a firm wrist. Always state the direction and nature of transfer clearly.
学习迁移是另一个热点。学生需要区分正迁移、负迁移、零迁移、双边迁移以及前摄/倒摄迁移。易错之处在于将双边迁移与正迁移混淆。双边迁移特指技能从一侧肢体转移到另一侧（例如用右手学会长曲棍球射门提升了左手）。它既可以是正也可以是负。当一名习惯大量使用手腕的羽毛球运动员学习壁球时，相似的手腕动作可能产生负迁移，因为壁球击球要求手腕固定。始终要清晰地说明迁移的方向和性质。
7. Bandura’s Self-Efficacy and Social Learning Theory | 班杜拉的自我效能感与社会学习理论
Bandura’s model appears in sports psychology questions on confidence and aggression. Students often define self-efficacy as ‘confidence in your ability’ but fail to mention that it is situation-specific, not a global trait. The four sources of self-efficacy – performance accomplishments, vicarious experience, verbal persuasion, and emotional arousal – must be applied to a sporting context. A frequent mistake is saying that watching a peer fail (vicarious experience) always lowers self-efficacy; it depends on the observer’s perceived similarity and the interpretation of the failure.
班杜拉的模型出现在运动自信心和攻击性的心理学问题中。学生们常把自我效能感定义为“对自己能力的信心”，却没有提到它是针对特定情境的，而不是一种整体特质。自我效能感的四个来源——表现成就、替代经验、言语劝说和情绪唤醒——必须应用到运动情境中。一个常见的错误是认为看到同伴失败（替代经验）总会降低自我效能感；这取决于观察者对相似性的感知以及如何解读那次失败。
In questions on aggression, the social learning theory is often misapplied. Bandura’s Bobo doll experiment demonstrated that aggression is learned through observation and imitation, especially if the model is reinforced. However, in sport, students need to discuss whether observed aggression on the pitch (e.g., a deliberate foul) is more likely to be imitated if the aggressor is a high-status role model and if the foul goes unpunished. Make the link: if a young football player sees a professional get only a warning for a reckless tackle, vicarious reinforcement may increase the likelihood of imitation. This is a powerful evaluation point for Bandura’s theory.
在关于攻击性的题目中，社会学习理论常被误用。班杜拉的布娃娃实验表明，攻击性是通过观察和模仿习得的，尤其是当榜样得到强化时。但在体育中，学生需要讨论：如果场上的攻击性行为（例如故意犯规）是由高地位榜样做出并且犯规未受惩罚，是否更容易被模仿？建立联系：如果一名年轻足球运动员看到职业球员一次鲁莽铲球只被警告，这种替代强化就会增加模仿的可能性。这是评价班杜拉理论的一个有力切入点。
8. Attribution Theory: Weiner’s Model and Self-Serving Bias | 归因理论：韦纳的模型与自利偏差
Weiner’s attribution model (locus of causality, stability, controllability) is a high-frequency 8-mark question. Students are required to explain how attributions for success and failure affect future motivation. The most common mistake is mixing up stability and controllability. Stability refers to whether the cause is changeable over time (ability is stable, effort is unstable). Controllability is whether the individual can influence the cause (effort is controllable, luck is uncontrollable). A coach telling a player ‘you lost because you lack talent’ (stable, uncontrollable) can destroy motivation, whereas ‘you lost because your strategy needs work’ (unstable, controllable) encourages persistence.
韦纳的归因模型（原因源、稳定性、可控性）是一道高频的 8 分题。学生需要解释对成功和失败的归因如何影响未来的动机。最常见的错误是混淆稳定性和可控性。稳定性指原因是否随时间改变（能力是稳定的，努力是不稳定的）。可控性指个体能否影响该原因（努力是可控的，运气是不可控的）。教练对球员说“你输球是因为没有天赋”（稳定、不可控）会摧毁动机，而说“你输球是因为策略还需要打磨”（不稳定、可控）则能激励坚持。
The self-serving bias is often inaccurately described. Students write that athletes ‘always’ attribute success to internal factors and failure to external factors. This is not universal. In practice, athletes who are coached positively learn to attribute failure to controllable, internal factors (effort) to maintain motivation. The self-serving bias is a tendency, not an absolute rule. To score high marks, discuss cultural differences: Western athletes often exhibit the self-serving bias, while some Eastern athletes show a self-effacing bias, attributing success externally to team support. This shows depth of understanding.
自利偏差常常被不准确描述。学生们写运动员“总是”将成功归于内部因素，将失败归于外部因素。这并非普遍。实际上，接受积极指导的运动员会学会将失败归因于可控的内部因素（努力），以维持动机。自利偏差只是一种倾向，不是绝对规则。想拿高分，要讨论文化差异：西方运动员常展现出自利偏差，而一些东方运动员则表现出自谦偏差，将成功归于外部的团队支持。这展示理解的深度。
9. Newton’s Laws and Their Application to Movement | 牛顿定律及其在运动中的应用
A common short-answer item asks students to apply Newton’s three laws to a sporting movement, for example a sprint start. Newton’s First Law (inertia): the sprinter remains at rest in the blocks until an external force (muscular force pushing against the blocks) acts. The mistake is saying the sprinter overcomes ‘velocity’; inertia is the resistance to change in state of motion, proportional to mass. Newton’s Second Law (F = ma): the greater the force applied to the blocks, the greater the acceleration, but the sprinter’s mass reduces acceleration. Newton’s Third Law (action-reaction): as the athlete pushes backward on the blocks, the blocks push forward on the athlete with equal force, driving them out.
一道常见的简答题要求将牛顿三定律应用于运动动作，例如起跑。牛顿第一定律（惯性）：短跑运动员在起跑器上保持静止，直到有外力（肌肉发力推起跑器）作用。错误是说运动员克服了“速度”；惯性是抵抗运动状态变化的性质，与质量成正比。牛顿第二定律（F = ma）：施加于起跑器的力量越大，加速度越大，但运动员的质量会减小加速度。牛顿第三定律（作用与反作用）：运动员向后推起跑器时，起跑器以同样大的力向前推动运动员，将其弹出。
When discussing angular motion, students easily confuse Newton’s laws with angular analogues. Angular inertia (moment of inertia) depends on mass distribution from the axis of rotation. To increase spin rate, a diver tucks, reducing the moment of inertia and increasing angular velocity due to conservation of angular momentum. Many students claim the diver ‘spins faster because they are lighter’, which is wrong – mass is unchanged; only the radius changes. Use the correct equation: L = I × ω (angular momentum = moment of inertia × angular velocity).
当讨论角运动时，学生容易把牛顿定律与旋转的对应量混淆。角惯性（转动惯量）取决于质量绕转轴的分布。为了提高旋转速度，跳水运动员收腹抱膝，减小转动惯量，根据角动量守恒增大角速度。许多学生声称“转得快是因为变轻了”，这是错的——质量未变，只是半径改变。要使用正确的方程：L = I × ω（角动量 = 转动惯量 × 角速度）。
10. Projectile Motion and the Parabolic Flight Path | 抛射体运动与抛物线飞行路径
Questions on projectile motion frequently appear alongside biomechanical analysis of a hockey drag flick or a basketball free throw. The crucial point is that the horizontal and vertical components of motion are independent. The only force acting on a projectile in flight (ignoring air resistance) is gravity, which affects only the vertical component. A common error is stating that there is a forward horizontal force keeping the shot moving; the horizontal velocity remains constant in the absence of air resistance. Students should label graphs clearly: horizontal velocity vs time is a flat line; vertical velocity vs time is a downward sloping line, crossing zero at the apex.
关于抛射体运动的题目常结合曲棍球拉球射门或篮球罚球进行生物力学分析。关键点是运动的水平分量和垂直分量是相互独立的。在飞行中（忽略空气阻力）唯一作用在抛物体上的力是重力，且只影响垂直分量。一个常见错误是说存在向前的水平力让铅球继续移动；在没有空气阻力时，水平速度保持不变。学生应清楚地标注图表：水平速度-时间图为一条平直线；垂直速度-时间图为一条下倾线，在最高点过零点。
A typical calculation might ask for the horizontal displacement of a shot put given initial velocity and angle. The steps needed are: resolve initial velocity into horizontal (V cos θ) and vertical (V sin θ) components; use the vertical component to find time of flight (by doubling the time to apex: t = (V sin θ)/g); then multiply horizontal velocity by total time. Many students forget to double the time to apex, giving displacement only for the upward phase. Remember to state your assumptions: the release and landing heights are equal unless stated otherwise, and air resistance is negligible.
一道典型计算题可能要求根据初速度和角度求铅球的水平位移。需要步骤：将初速度分解为水平分量（V cos θ）和垂直分量（V sin θ）；利用垂直分量求飞行总时间（到达最高点时间的两倍：t = (V sin θ)/g）；再将水平速度乘以总时间。很多学生忘记将到最高点时间加倍，只算出了上升阶段的位移。记得要说明假设：除非特别说明，释放高度和落地高度相同，且空气阻力可忽略不计。
11. Periodisation and Training Programme Design | 阶段性训练与训练计划设计
Periodisation is a high-tariff topic linking training principles to long-term athlete development. Students must know the macrocycle, mesocycle, and microcycle structure. A frequent mistake is confusing the purpose of the preparatory phase with the competition phase. The preparatory phase (general and specific) builds the base; the competition phase maintains fitness and focuses on tactics. The transition phase is not simply ‘rest’ – it allows physical and mental recovery while maintaining some level of activity to avoid detraining.
阶段性训练是一个高分值话题，连接训练原理与长期运动员发展。学生必须知道大周期、中周期和小周期的结构。常见错误是把准备期和竞赛期的目的弄混。准备期（一般准备和专项准备）构筑基础；竞赛期维持体能并聚焦战术。过渡期不仅仅是“休息”——它允许身心恢复，同时维持一定活动水平以避免停训效应。
When explaining tapering, students often claim it ‘makes you fresher’ without detailing the physiological basis. A well-designed taper reduces training volume by 40-60% while maintaining intensity over 7-21 days, leading to increased glycogen stores, repaired muscle tissue, and optimised enzyme activity. The common error is reducing intensity, which leads to detraining. Also, linking to injury prevention: a poorly planned microcycle with too many high-intensity sessions back-to-back can cause overuse injury. Use terms like ‘training monotony’ and ‘acute:chronic workload ratio’ to show depth.
在解释减量训练时，学生常只说“让你更有活力”，却不阐述其生理基础。精心设计的减量训练在 7-21 天内减少 40-60% 训练量，同时保持训练强度，这会带来糖原储备增加、肌肉组织修复和酶活性优化。常见错误是降低强度，这会导致停训效应。同时要联系伤害预防：一个规划不当的中周期，过多高强度训练课连续安排，会造成过度使用损伤。使用“训练单调性”和“急性：慢性负荷比”这些术语来展示深度。
12. Sport and Society: Social Class and Participation Patterns | 体育与社会：社会阶层与参与模式
In the Sport and Society section, questions on participation barriers across social groups are extremely common. Students can list barriers (cost, access to facilities, time, cultural attitudes) but often fail to link them specifically to theoretical concepts like habitus (Bourdieu) or social stratification. For high marks, explain that lower socio-economic groups may experience financial constraints that limit club membership and equipment purchase, but also discuss cultural capital: a lack of familiarity with the unwritten ‘rules’ of middle-class sports (e.g., golf etiquette) can act as a hidden barrier.
在体育与社会板块，关于不同社会群体的参与障碍的问题极为常见。学生能列举障碍（费用、设施准入、时间、文化态度），但往往未能将其具体与理论概念如习性（布迪厄）或社会分层联系起来。想要高分，应解释低社会经济群体可能面临限制俱乐部会员资格和器材购买的财务约束，但同时还要讨论文化资本：对中产阶级运动（如高尔夫礼仪）不成文的“规则”不熟悉可能成为隐性障碍。
A data-response item might show a table of participation rates in rugby union by socio-economic class. The lower participation rate among lower classes is not solely about money. Rugby’s historical public school origins created a cultural tradition that may feel exclusionary. The concept of ‘social exclusion’ is crucial. Moreover, when evaluating initiatives like Sport England’s ‘This Girl Can’, students must mention that campaigns can shift attitudes but may not overcome deep-seated structural inequalities without sustained investment. This evaluative edge marks the difference between a C-grade and an A-grade response.
一道数据分析题可能给出表格显示不同社会经济阶层的橄榄球联盟参与率。低阶层的低参与率不仅因为金钱。橄榄球历史上的公学渊源创造了一种可能感觉排他的文化传统。“社会排斥”概念至关重要。此外，在评价像英格兰体育的“This Girl Can”这样的倡议时，学生必须提到这些运动能转变态度，但若没有持续投资，可能难以克服根深蒂固的结构性不平等。这种批判性评价正是 C 等与 A 等答卷的分水岭。
Published by TutorHao | Sports Science Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
屏轩国际教育cambridge primary/secondary checkpoint, cat4, ukiset,ukcat,igcse,alevel,PAT,STEP,MAT, ibdp,ap,ssat,sat,sat2课程辅导，国外大学本科硕士研究生博士课程论文辅导Cancel reply