📚 High-Frequency CAIE Media Exam Topics and Common Mistakes for Year 10 | Year 10 CAIE 媒体:高频考点与易错题分析
Understanding the CAIE Media Studies syllabus at Year 10 means more than just watching films or designing posters. It requires you to apply key concepts such as media language, representation, audience, and institution to set texts and unseen materials. Many students lose marks not because they do not know the material, but because they fail to express their knowledge in the precise, analytical way examiners expect. This guide walks through the most frequently tested topics and the pitfalls that repeatedly trip up Year 10 candidates, with clear examples and fixes for each.
理解 Year 10 的 CAIE 媒体研究课程,不仅仅是看电影或设计海报那么简单。它要求你将媒体语言、表征、受众和机构等关键概念应用到指定的文本和未曾见过的素材中去。很多同学丢分并非因为不懂知识,而是因为没有用考官所期望的那种精确、分析性的方式来表达自己的想法。这份指南会带你梳理最常考的知识点,以及 Year 10 考生反复掉进的陷阱,并针对每一个问题提供清晰的例子和修正方法。
1. Media Language: Semiotics and Meaning | 媒体语言:符号学与意义
A high-frequency topic is semiotics, the study of signs. You need to confidently identify signifiers (the physical form of a sign) and signifieds (the mental concept), and then move on to the distinction between denotation (what is literally seen) and connotation (the cultural or emotional meaning). The most common mistake here is labelling a point as ‘connotation’ when you are still simply describing the denotative level. For example, saying ‘The red dress connotes the colour red’ is wrong; you must explain what the red stands for — passion, danger, love, or power — depending on context.
一个高频考点是符号学,即关于符号的研究。你需要能够自信地识别能指(符号的物质形式)和所指(心理概念),然后进一步区分外延(字面上看到的东西)和内涵(文化或情感上的意义)。这里最常见的错误是,你其实还停留在描述外延的层面,却标记成“内涵”。例如,说“红裙的内涵是红色”就是错误的;你必须解释红色代表什么——根据语境,可能代表激情、危险、爱情或权力。
- Pitfall: Students often confuse icon, index, and symbol. An icon physically resembles what it represents (e.g., a photograph of a tree). An index has a direct, causal link (e.g., smoke indexes fire). A symbol is arbitrary and relies on cultural convention (e.g., a red rose symbolises love). Mixing these up in an exam loses easy marks. Always ask yourself: is the connection physical, causal, or learned?
- 易错点:学生经常混淆图像符号(icon)、指示符号(index)和象征符号(symbol)。图像符号在物理上与其所代表的东西相似(如一棵树的照片)。指示符号有直接的因果联系(如烟指示火)。象征符号是任意的,依赖文化约定(如红玫瑰象征爱情)。在考试中把它们弄混会白白丢分。一定要问自己:这个联系是物理的、因果的,还是后天习得的?
2. Visual Codes: Camera Shots and Angles | 视觉编码:镜头与角度
When analysing a set text or unseen extract, you must use correct terminology for camera shots (extreme long shot, long shot, mid shot, close-up, extreme close-up) and angles (high angle, low angle, eye-level, bird’s-eye, worm’s-eye). The most frequent error is that candidates merely name the shot or angle without linking it to meaning — for example, ‘There is a close-up of the detective’ but not explaining that the close-up reveals his furrowed brow and clenched jaw, connoting determination and suppressed anger. Always state the visual evidence, then the connotations, and then tie it to narrative or representation.
在分析指定文本或未见过的视频片段时,你必须使用正确的镜头(远景、全景、中景、特写、极端特写)和角度(俯角、仰角、平视、鸟瞰、虫看)的术语。最常见的错误是考生只说出镜头或角度的名称,却不联系意义——比如,“这里有侦探的一个特写”,但没有解释这个特写揭示了他紧锁的眉头和咬紧的下巴,暗示着决心和被压抑的愤怒。一定要先说视觉证据,然后是内涵意义,再联系叙事或表征。
- Pitfall: Describing a camera movement as ‘a zoom’ when it is actually a tracking shot. A zoom changes the focal length of the lens, magnifying the image without moving the camera; a tracking shot physically moves the camera through space. Also, many students forget to mention the effect on the audience — a sudden zoom into a face may create intimacy or shock, while a slow track can build suspense. Examiner tip: always include the audience response.
- 易错点:把摄影机运动描述成“变焦(zoom)”,而实际上是推轨镜头(tracking shot)。变焦改变的是镜头的焦距,不用移动摄影机就能放大画面;推轨镜头则是让摄影机在空间中实际移动。还有,很多学生忘了提对受众的影响——突然把镜头推向一张脸,可能产生亲密感或震撼感,而缓慢的推轨则可以营造悬疑。考官小贴士:永远要写上受众反应。
3. Editing: Continuity and Montage | 编辑:连续性与蒙太奇
Editing questions often ask you to explain how meaning is created through the combination of shots. Key terms include cut, shot/reverse shot, match on action, eye-line match, cross-cutting, montage, and pace (slow, rapid). The classic mistake is describing editing as ‘fast’ or ‘slow’ without quantifying or interpreting it. A better approach: ‘The rapid cross-cutting between the kidnapper’s lair and the police station, with shots lasting no more than two seconds each, creates a sense of urgency and panic, forcing the audience to feel the simultaneous pressure on both the victim and the rescuers.’
剪辑类的题目经常要求你解释如何通过镜头的组合来创造意义。关键术语包括剪辑(cut)、正反打镜头(shot/reverse shot)、动作匹配剪辑(match on action)、视线匹配(eye-line match)、交叉剪辑(cross-cutting)、蒙太奇(montage)和节奏(慢、快)。典型错误是只描述剪辑“快”或“慢”,却不定量、不诠释。更好的写法是:“绑匪巢穴与警察局之间的快速交叉剪辑,每个镜头持续时间不超过两秒,制造出一种紧迫感和恐慌感,迫使受众同时感受到受害者和营救者双方所承受的压力。”
- Pitfall: Forgetting continuity editing principles. The 180-degree rule, the 30-degree rule, and establishing shots maintain spatial clarity. When these are broken — for instance, by a jump cut — you must comment on the disorientation or deliberate disruption of narrative flow. Many students simply say ‘it is a jump cut’ without discussing why the filmmaker chose to break the rule. Always ask: why is the disruption happening now?
- 易错点:忘记连续性剪辑的原则。180度规则、30度规则和定场镜头维持空间清晰性。当这些规则被打破时——例如,通过跳接——你必须评论这种迷惑感或对叙事流的有意破坏。许多学生只是说“这是一个跳接”,却不讨论为什么电影制作者选择打破规则。永远要问:为什么在这个时候打破连续性?
4. Sound: Diegetic and Non-Diegetic Sounds | 声音:画内音与画外音
Sound work is often treated as an afterthought, but it accounts for half the moving-image experience. You must distinguish diegetic sound (originating from within the story world, e.g., dialogue, footsteps, a radio playing) from non-diegetic sound (added for the audience, e.g., background music, voice-over narration). A frequent error is to classify a character’s internal thoughts as voice-over — if the character is recalling a memory and we hear their voice, it is a non-diegetic interior monologue unless demonstrated otherwise. Another common slip: describing a sound bridge inaccurately. A sound bridge is when sound from the next scene starts before the visual transition, or sound from the current scene lingers into the next; it smoothens the edit and links ideas.
声音的处理常常被当成附加项,但它占了动态影像体验的一半。你必须区分画内音(来自故事世界之内,如对话、脚步声、开着收音机)与画外音(为受众添加的,如背景音乐、画外解说)。常见错误是把角色的内心想法归类为画外解说——如果角色在回忆一段往事,而我们听到他的声音,那么除非另有说明,否则这就是非画内的内心独白。另一个常见失误是:不准确地描述声音桥梁(sound bridge)。声音桥梁是指下一个场景的声音在画面转场之前就开始,或者当前场景的声音延续到下一个场景;它能平滑剪辑并串联思想。
- Pitfall: Using vague terms like ‘music creates atmosphere’ without specifying the genre, tempo, instrumentation, or key of the music. A slow, minor-key string piece connotes sadness and tension, while an uptempo brass fanfare connotes triumph. Always name the sonic element and its precise emotional effect. Also, describe how sound works with the image — is it synchronous (matched) or asynchronous (contradicting)? Contrapuntal sound, where the music seems at odds with the visual, is a rich area for analysis but often ignored.
- 易错点:使用模糊的词语,如“音乐营造气氛”,却不说明音乐的类型、速度、乐器或调性。一首缓慢、小调的弦乐作品暗示悲伤和紧张,而欢快的铜管号角暗示胜利。永远要指出声音元素的名称和它精确的情感效果。还要描述声音如何与画面配合——是同步的(匹配)还是异步的(矛盾)?对位法声音(contrapuntal sound),即音乐似乎与画面相矛盾,是一个分析宝库,却经常被忽略。
5. Narrative Theories: Todorov and Propp | 叙事理论:托多罗夫与普罗普
Year 10 candidates are regularly asked to apply basic narrative theories. Todorov’s equilibrium theory (equilibrium → disruption → recognition → attempt to repair → new equilibrium) is the most common. The pitfall is applying it rigidly without considering whether the narrative actually follows all five stages — sometimes the text begins in disruption, or ends with no clear new equilibrium. You gain marks for discussing how the text conforms to or subverts the model. Propp’s character functions (hero, villain, donor, helper, princess, dispatcher, false hero) are also tested; however, many students misidentify the dispatcher (the character who sends the hero on the quest) and confuse the princess with the helper. Remember, one character can embody multiple functions.
Year 10 考生经常被要求应用基础叙事理论。托多罗夫的均衡理论(均衡 → 破坏 → 承认 → 尝试修复 → 新的均衡)是最常见的。陷阱在于过于僵化地套用,而不考虑叙事是否真的经历了全部五个阶段——有时候,文本一开始就处于破坏中,或者结束时并没有明确的新的均衡。你要通过讨论文本如何符合或颠覆这个模式来得分。普罗普的角色功能(英雄、反派、捐献者、助手、公主、派遣者、假英雄)也会被考到;但是,很多学生会认错派遣者(派英雄踏上征程的角色),以及把公主和助手搞混。记住,一个角色可以承担多个功能。
- Pitfall: Applying narrative theory without supporting it with textual details. Saying ‘Todorov’s equilibrium is restored’ is insufficient. You must identify the specific moment of disruption (e.g., the arrival of the alien spaceship at 00:12:34) and the precise shot or line of dialogue that signals the recognition stage. The same applies to Propp: name the character, state their function, and give an example of an action that proves this function.
- 易错点:应用叙事理论却不提供文本细节作为支撑。只说“托多罗夫的均衡得到了恢复”是不够的。你必须指明破环发生的具体时刻(例如,外星飞船在00:12:34出现),以及标示承认阶段的精确镜头或对白。普罗普的理论也一样:说出角色的名字、他们的功能,并给出一个能证明该功能的行为例子。
6. Representation: Stereotypes and Ideology | 表征:刻板印象与意识形态
Representation analysis is a core skill. You must discuss how media texts portray social groups (gender, ethnicity, age, class, etc.) and whether they reinforce or challenge stereotypes. The most common error is making broad claims without evidence — ‘the advertisement reinforces gender stereotypes’ — without quoting the costume, pose, lighting, or camera angle that does so. A higher-level answer will also explore ideology: the set of beliefs and values being promoted. For instance, a cleaning product ad showing a smiling woman in a pristine kitchen reinforces patriarchal ideology and the cult of domesticity. Conversely, an ad showing a father and daughter doing DIY may challenge traditional gender roles.
表征分析是一项核心技能。你必须讨论媒体文本如何描绘社会群体(性别、种族、年龄、阶级等),以及它们是强化还是挑战刻板印象。最常见的错误是缺乏证据的泛泛而论——“广告强化了性别刻板印象”——却不引用通过服装、姿势、照明或镜头角度来达到此目的的具体细节。更高层次的回答还会探究意识形态:即所推广的一套信念和价值观。例如,一个清洁产品广告里,一个微笑的女性站在一尘不染的厨房中,强化了父权意识形态和家庭崇拜。相反,一个展示父亲和女儿一起DIY的广告则可能挑战了传统的性别角色。
- Pitfall: Treating representation as either completely positive or negative. Most texts contain complex, ambivalent representations. A music video might empower a female artist through active, confident performance but simultaneously objectify her through a fragmented, lingering camera that focuses on body parts. You must demonstrate the ability to see both sides: ‘The video presents the artist as a powerful figure through low-angle shots and direct eye contact with the camera, yet the editing repeatedly dismembers her body, reducing her to a collection of sexualised parts.’
- 易错点:把表征处理成要么完全正面、要么完全负面。大多数文本包含着复杂、矛盾的表征。一个音乐视频可能通过积极自信的表演来赋予一位女艺人力量,但同时却通过支离破碎、流连游移的镜头聚焦于身体部位,将她物化。你必须展现看到正反两面的能力:“视频通过低角度镜头和与摄影机的直视眼神,将艺人呈现为一个强大的人物,然而剪辑不断割裂她的身体,将她弱化成一系列被性感化的部件。”
7. Media Institutions and Regulation | 媒体机构与监管
Institutional context matters. You need to know how funding, ownership, and regulation shape media output. For example, a BBC programme must adhere to the Royal Charter and Ofcom broadcasting code, prioritising impartiality and public service; a Netflix original, funded by subscription, may take more creative risks and target a niche audience. Common mistake: confusing public service broadcasting (PSB) with state-controlled media. The BBC is a public service broadcaster, independent from government day-to-day editorial control, funded by the licence fee. In contrast, a state broadcaster like China Central Television is directly controlled by the state.
机构语境很重要。你需要了解资金、所有权和监管如何塑造媒体产品。例如,BBC 的节目必须遵守皇家特许状和 Ofcom 广播守则,优先保障公正性和公共服务;一部由订阅费资助的 Netflix 原创剧,则可能在创意上冒更大的风险,并瞄准特定的小众受众。常见错误:混淆公共服务广播(PSB)与国控媒体。BBC 是公共服务广播公司,日常编辑独立于政府,通过许可证费资助。相比之下,像中国中央电视台这样的国家广播公司则直接受国家控制。
- Pitfall: Ignoring regulation entirely when discussing a text’s controversial content. If the set text is a film trailer with violence, you should comment on the BBFC age rating and guidelines. If it is a video game, refer to PEGI ratings and the debate around interactivity and harm. Always link institutional factors to the final product — would this text exist in the same form if it were produced for a public service broadcaster versus a commercial cable channel? The answer is almost always no.
- 易错点:在讨论一部有争议的文本内容时,完全忽视监管问题。如果指定文本是一部含有暴力的电影预告片,你就应该评论英国电影分级委员会(BBFC)的年龄分级和指引。如果是一款电子游戏,则要提到泛欧游戏信息组织(PEGI)的分级以及围绕互动性与危害的争论。永远要把机构因素和最终产品联系起来——假如这个文本是为公共广播公司而非商业有线频道制作的,它还会以同样的形式存在吗?答案几乎总是否定的。
8. Audience Theories: Uses and Gratifications, Encoding/Decoding | 受众理论:使用与满足、编码/解码
Two audience models are central: Uses and Gratifications (Blumler & Katz) and Hall’s Encoding/Decoding model. With Uses and Gratifications, you identify the needs a media text satisfies: personal identity (reinforcing self-image), information, entertainment (diversion), and social interaction (both companionship with characters and real-world conversation). A typical error is mislabeling ‘escapism’ as ‘social interaction’; escaping from reality is diversion/entertainment, not social. With Hall, remember that meaning is encoded by producers but decoded by audiences in three ways: dominant (accepting the intended meaning), negotiated (partially accepting, partially modifying), or oppositional (rejecting the intended meaning entirely). The mistake is assuming all audiences decode the same way — always consider how different social positions (age, gender, culture) lead to different readings.
两个受众模型是核心:使用与满足理论(布鲁姆勒与卡茨)和霍尔的编码/解码模型。使用与满足理论让你识别出媒体文本满足的哪些需求:个人认同(强化自我形象)、信息、娱乐(消遣)和社交互动(既包含与角色的陪伴,也包含真实世界的对话)。一个典型错误是把“逃避现实”错误地归为“社交互动”;逃离现实属于消遣/娱乐,而非社交。对于霍尔的模型,要记住意义是由制作者编码,但由受众以三种方式解码:主导型(接受预期的意义)、协商型(部分接受,部分修改)或对抗型(完全拒绝预期的意义)。错误在于假设所有受众都以同一种方式解码——永远要考虑不同的社会位置(年龄、性别、文化)会导致不同的解读。
- Pitfall: When asked to ‘analyse how a text targets a specific audience’, students list demographic categories (e.g., ‘teenagers, 15-24’) but fail to explain the techniques used to attract them. You must link technical codes to audience appeal: the use of fast-paced editing, colloquial slang, and a hip-hop soundtrack in an online teen series targets young viewers by offering them a familiar cultural world and a sense of personal identity. Also, mention psychographics (values, lifestyle) where relevant — not all teenagers have the same tastes.
- 易错点:当被问到“分析一个文本如何瞄准特定受众”时,学生们列出人口统计类别(例如,“青少年,15-24岁”),却没有解释吸引他们的手法。你必须把技术编码与受众吸引力联系起来:在青少年网络剧中使用快节奏剪辑、口语化的俚语和嘻哈配乐,通过提供一个熟悉的文化世界和个人认同感来瞄准年轻观众。另外,在相关情况下要提到心理统计(价值观、生活方式)——并非所有青少年品味相同。
9. Textual Analysis: Print Advertisements | 文本分析:印刷广告
Print ad analysis regularly appears. You are expected to examine layout, typography, colour palette, image composition, anchorage (how text fixes the meaning of an image), and brand identity. The most common flaw is treating anchorage as simply a caption — the copy and visual work together, and you must explain how the text directs the reader towards a preferred reading. A simple example: an image of a melting ice cap could be anchored by the line ‘Before it’s too late’, steering the interpretation toward urgency and climate action rather than mere aesthetic appreciation of ice.
印刷广告分析经常出现。你需要审视布局、字体排版、色彩搭配、图像构图、锚定(文字如何固定图像的意义)和品牌认同。最常见的缺陷是把锚定仅仅当作说明文字——文案和视觉共同起作用,你必须解释文字如何引导读者走向一个优先解读。一个简单的例子:一幅正在融化的冰盖图像,可以被“在一切太晚之前”这句话锚定,从而将解读引向紧迫感和气候行动,而非仅仅对冰的审美欣赏。
- Pitfall: Describing every element without a hierarchy of importance. You must identify the dominant signifier — the first thing the audience notices — and explain why it has been given that prominence. Usually this is achieved through size, colour contrast, or placement along the rule-of-thirds intersection. Then systematically consider how secondary elements support it. Also, always discuss the brand logo and slogan: how do they sum up the brand’s promise or unique selling proposition (USP)?
- 易错点:没有主次之分地描述每个元素。你必须识别支配性符号——受众最先注意到的东西——并解释为什么它被赋予了这种突出地位。这通常通过尺寸、色彩对比或放在三分法交点上实现。然后系统地考虑次要元素如何支持它。另外,永远要讨论品牌标志和标语:它们如何概括了品牌的承诺或独特卖点(USP)?
10. Textual Analysis: Moving Image (Film/TV Opening) | 文本分析:动态影像(电影/电视开场)
For moving image extracts, you must write about all four technical areas: camerawork, editing, sound, and mise-en-scène (setting, lighting, costume, figure expression/movement, props). A frequent underperformer is mise-en-scène analysis — many students mention lighting but only say ‘low-key lighting’ without connecting it to genre (typically film noir or horror) or character psychology. High-key lighting may suggest an upbeat comedy or a sterile corporate environment. Props are often ignored: a character’s choice of weapon, book, or food can convey enormous amounts of information about their personality and social status.
对于动态影像片段,你必须写遍全部四个技术领域:摄影、剪辑、声音和场面调度(场景、灯光、服装、人物表情/动作、道具)。通常分析得不够好的是场面调度——许多学生提到了灯光,但只说“低调用光”,却不联系类型片(通常是黑色电影或恐怖片)或角色心理。高调用光则可能暗示一部欢快的喜剧,或者一个冷冰冰的企业环境。道具经常被忽略:一个角色对武器、书籍或食物的选择,可以传达出关于其个性和社会阶层的大量信息。
- Pitfall: Writing a technical ‘shopping list’ — camerawork paragraph, then editing paragraph, then sound — without showing how they combine to construct a unified meaning. The best answers interweave the areas from the start: ‘The slow tracking shot through the dimly lit corridor, accompanied by dissonant string notes and the distant drip of water, constructs an atmosphere of dread and isolation before the protagonist even appears.’ Practice writing integrated paragraphs that synthesise at least two technical areas per sentence or two.
- 易错点:写一份技术“清单”——摄影段落,然后编辑段落,然后声音——却没有展现它们如何组合起来构建一个统一的意义。最佳答案从一开始就交织各个领域:“缓慢的推轨镜头穿过灯光昏暗的走廊,伴随着不和谐弦乐和远处的水滴声,在主角尚未出现之前,就构建出一种恐惧和孤立的氛围。”练习写综合性的段落,每句话或每两句话就综合至少两个技术领域。
11. Creative Tasks: Designing with Purpose | 创意任务:有目的地设计
In the coursework or written exam creative tasks (e.g., design a film poster, a magazine cover, or storyboard a sequence), students often prioritise artistic flair over media rationale. You must provide an explicit rationale linking every creative decision to a target audience and institutional context. For a film poster, your choice of title font, tagline, central image, and credit block must all be explained: ‘The sans-serif, metallic font connotes science fiction and urban grit, targeting 16-25 year-old males familiar with the cyberpunk subgenre. The tagline “Trust No System” appeals to the audience’s sense of rebellion, a key gratifier.’ Without rationale, even a beautiful design gets a low mark.
在课程作业或笔试的创意任务中(例如,设计一张电影海报、杂志封面,或者为一个段落绘制故事板),学生经常把艺术才华置于媒体逻辑之上。你必须提供清晰的设计说明,把每一个创意决策都与目标受众和机构语境联系起来。对于一张电影海报,你必须解释标题字体、宣传语、中心图像和演职员列表区块的选择:“这种无衬线的金属感字体暗示了科幻与都市粗粝感,瞄准熟悉赛博朋克子类型的16-25岁男性受众。宣传语‘Trust No System’迎合了受众的叛逆感,这是一项关键的满足感来源。”没有设计说明,再漂亮的设计也只能拿低分。
- Pitfall: Ignoring layout conventions. A film poster has a set layout: main image dominating, title near the bottom third, credits in the bottom strip. A magazine cover requires a masthead, main cover line, cover lines, barcode, and date line. If your creative response misses these mandatory elements, examiners will deduct marks for lack of generic knowledge. Always check the conventions checklist before submitting.
- 易错点:忽略布局惯例。电影海报有固定的布局:主图像占据主导,片名靠近底部三分之一处,演职员列表在底部条状区域。杂志封面要求有刊头、主封面标题、封面副标题、条形码和日期行。如果你的创意答卷缺少这些强制元素,考官会因缺少类型知识而扣分。在提交前,一定要对照惯例检查清单。
12. Top Exam Pitfalls and How to Avoid Them | 常見考試失分點與對策
To summarise, the most pervasive issues across all topics are: (1) describing rather than analysing — always include the ‘so what?’; (2) using media terminology incorrectly — revise your glossary regularly; (3) failing to give precise textual evidence — name the exact shot, colour, line of dialogue; (4) ignoring audience, institution, or representation when the question asks for them — read the question closely; (5) poor time management — allocate one minute per mark and leave time to proofread. Practise past papers under timed conditions, and for each answer, check that you have linked at least two areas of the theoretical framework.
总而言之,贯穿所有主题的最普遍问题有:(1)描述而非分析——永远要回答“那又怎样?”;(2)媒体术语使用错误——定期复习你的术语表;(3)未能提供精确的文本证据——说出确切的镜头、颜色、对白台词;(4)当题目问到受众、机构或表征时忽略它们——仔细审题;(5)时间管理不当——按一分一分钟的原则分配时间,并留出校对时间。在限时条件下练习做真题,并且对每个答案都检查一遍,确保你至少将理论框架中的两个领域联系了起來。
Mastering these areas will transform your answers from vague descriptions to precise, analytical essays grounded in the CAIE Media Studies mark scheme. Good luck with your revision, and remember: every technical choice in a media text is a deliberate one — your job is to uncover the reasoning and the effect.
掌握了这些领域,你的答案将从模糊的描述蜕变为立足CAIE媒体研究评分标准的精确、分析性文章。祝复习顺利,记住:媒体文本中的每一项技术选择都是刻意的——你的任务就是揭示其理由和效果。
Published by TutorHao | Media 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