2024年考研英语一真题 Section I How Automatic Door Mechanisms Work
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How Automatic Door Mechanisms Work

2024年考研英语一真题文章逐层精读

How It Works Daily网站2021年3月25 日文章 How Automatic Door Mechanisms Work(自动门装置的工作原理)。

本页是 2024年考研英语一真题 Section I 文章的精读视角页——这篇说明文全文 271 词、4 段,CEFR 难度 B2(B2 级在考研英语一文章中占 7%),作者立场为「积极支持」;英文原文之外,本篇已有的 11 项精读维度逐项展开,其中能迁移到其他考研英语真题文章的判断方法(篇章结构、修辞、言外之意、作者态度、体裁速判)随各维度一并讲透。

精读最佳实践

本页解析里的段号(P1)都可以点——点一下,原文在顶部翻开并定位到该段,解析引用的原文同步标亮;合上原文,你还停在刚才读到的位置。点 P1 试试。

PASSAGE · 文章原文

4 段英文原文

以下为2024年考研英语一真题 Section I 的完形填空(四选一)原文,共 4 段。左侧 P1–P4 是段落编号——本页全部解析(结构、逐段、修辞、自检题)都以它为坐标回指原文,点击解析里的段号,原文即在顶部翻开并定位到该段、引用的原文同步标亮;合上原文仍停在当前阅读位置。原文保持卷面形态,不带翻译与标注。

How Automatic Door Mechanisms Work

There's nothing more welcoming than a door opening for you. Without the need to be touched to open or close, automatic doors are essential in improving disabled access to buildings and helping provide general convenience to commercial buildings.

Self-sliding doors began to emerge as a commercial product in 1960 after being invented six years previously by Americans Dee Horton and Lew Hewitt. They started out as a novelty feature, but as their use has grown, their benefits have extended within our technologically advanced world. Particularly useful in busy locations or during times of emergency, the doors act as crowd management by reducing the obstacles put in people's way.

As well as making access both in and out of buildings easier for people, the difference in the way many of these doors open helps reduce the total area occupied by them. Automatic doors often open to the side, with the panels sliding across one another. Replacing swing doors, these allow smaller buildings to maximise the usable space inside without having to clear the way for a large, sticking-out door. There are many different types of automatic door, with each relying on specific signals to tell them when to open. Although these methods differ, the main principles remain the same.

Each automatic door system analyses the light, sound, weight or movement in its vicinity as a signal to open. Sensor types are chosen to complement the different environments they are needed in. For example, a busy street might not suit a motion-sensored door, as it would constantly be opening for passers-by. A pressure-sensitive mat would be more appropriate to limit the surveyed area.

PARAGRAPHS · 逐段精读

4 段逐段主旨与解读

逐段拆解2024年考研英语一真题 的这篇原文——每段给出英文段落主旨、段落标题与中文解读,并提炼一条「这段为什么这样读」的具体方法。

  1. P1

    Introduction: Benefits and Essential Role of Automatic Doors

    Automatic doors provide welcoming, touchless access that is essential for disabled accessibility and offers general convenience to commercial buildings.

    作为article的opening paragraph,这一段establish了整个expository text的scope和focus。它directly connects to文章主旨中提到的improved accessibility for disabled people和practical benefits。通过presenting automatic doors as both essential和convenient,这个paragraph sets up后续段落对historical development、space efficiency和sensor technologies的deeper exploration。特别是essential这个词的使用,它elevates automatic doors from mere convenience to necessary infrastructure,这种positioning为entire article的serious、informative tone定下了基调。

    识别开篇段的话语功能三要素
  2. P2

    Historical Development: From Novelty to Necessity

    Automatic doors evolved from a 1960s novelty invention to an essential technology that manages crowds and reduces obstacles in busy or emergency situations.

    这个paragraph在article structure中起到crucial transitional role。它connects opening paragraph介绍的current benefits到它们的historical roots,为后续technical explanation提供temporal context。这directly supports文章主旨中提到的'historical development since 1960'。更重要的是,通过showing evolution from novelty to necessity,it reinforces了opening paragraph established的'essential'characterization。Crowd management function的introduction也为later paragraphs关于space efficiency和sensor types的discussion埋下伏笔,因为这些technical features都serve这个broader functional goal。

    追踪时间标记与评价语言的交织
  3. P3

    Technical Advantages: Space Efficiency Through Sliding Mechanisms

    Automatic doors improve bidirectional access and maximize interior space through sliding mechanisms, with various types sharing common operating principles.

    这个paragraph深化了article对automatic doors practical benefits的exploration。它directly elaborates文章主旨中提到的'space efficiency through sliding mechanisms'。通过explaining technical mechanism in detail,it moves beyond 第1段的general benefit statement到specific operational understanding。Paragraph也strategically positioned between historical context(第2段)和upcoming sensor technology discussion(第4段),serving as bridge that grounds abstract benefits in concrete mechanical design。结尾关于variety with unified principles的statement为next paragraph's exploration of different sensor types做了smooth transition,maintaining article的logical flow。

    识别技术段落的问题-方案-效益链
  4. P4

    Sensor Technology: Environment-Specific Signal Detection

    Automatic door systems analyze various signals (light, sound, weight, movement) and select environment-appropriate sensors to optimize performance, such as using pressure mats in busy areas.

    作为article的concluding paragraph,这一段完成了automatic doors working mechanism的explanation。它directly addresses文章主旨中提到的'various sensor technologies'。通过explaining how different sensors work和why selection matters,it provides technical depth that complements earlier paragraphs的functional descriptions。这个paragraph也nicely circles back to 第3段结尾提到的'different types'和'main principles',showing那些principles如何manifest in actual sensor choices。Busy street example特别effective because它connects to 第2段提到的crowd management function,demonstrating how sensor design serves那个broader purpose。整个paragraph为article提供了satisfying technical closure。

    平衡通用原则与具体示例的权重
SELF CHECK · 段落自检题

4 道逐段细节自检题

针对2024年考研英语一真题这篇原文,每段配 1 道细节题( 1 个正确项 + 5 个干扰项 ,由懒笔记精读引擎基于本段命制,非试卷原题)。 选项默认中性;点「显示答案与解析」展开正确项、解析与最快解法,现代浏览器会同步高亮正确选项。

  1. 第 1 段 定位词 automatic doors commercial buildings

    What is a primary value of automatic doors in commercial buildings?

    • A They eliminate the need for commercial buildings to employ staff.
    • B They are designed mainly to make buildings look more modern.
    • C They improve accessibility while also providing everyday convenience.
    • D They prevent disabled people from entering crowded buildings.
    • E They are useful only when visitors cannot touch a door.
    • F They increase the physical size of building entrances.
    显示答案与解析 收起答案与解析

    正确答案:C

    该项将 improve disabled access 转述为 improve accessibility,将 helping provide general convenience 保留为 providing everyday convenience,完成了两个并列 benefits 的等义整合。障碍在于题干用 a primary value 采用单数,而原文呈现两个功能;考生若机械理解单数,容易只选 accessibility 或 convenience。考研细节题中,概括性单数题干常允许正确项呈现一个由两部分构成的完整 value。

    双收益打包 时间极紧时,不必从头逐句精读。抓住题干中 commercial buildings 这个低频场景词,直接扫描 第1段;然后采取“双收益打包”法:在相邻句中快速圈出两个并列的 benefit,再检查选项中是否把二者都保留下来。能完整打包两项信息的正确项,通常比只复述一个词的选项更稳。

  2. 第 2 段 定位词 manage crowds busy

    Why can self-sliding doors help manage crowds in busy or emergency situations?

    • A They stop people from entering a building during an emergency.
    • B They direct every visitor to a separate entrance.
    • C They remain closed until a large crowd has gathered.
    • D They reduce obstacles that would otherwise hinder people's movement.
    • E They were invented specifically for emergency exits.
    • F They require users to touch fewer control panels.
    显示答案与解析 收起答案与解析

    正确答案:D

    该项准确对应 doors act as crowd management by reducing the obstacles put in people's way。reduce obstacles 是原文核心机制,hinder people's movement 则将 put in people's way 作自然释义。命题障碍是原文将原因置于 by reducing 的方式状语中,许多考生只记住 crowd management 这一结果,却忽略其后的机制解释。

    截取by后机制 最快路径是用 manage crowds 直接命中 第2段,然后不读全部历史背景,只截取该短语后面的 by 结构。把 by 后的动作为“机制证据条”,逐项选项只做一件事:检查其是否等义改写这张证据条。正确项保留了 reduce 与 obstacles 的因果骨架,其他选项即使含 emergency 或 crowd,也可迅速排除。

  3. 第 3 段 定位词 smaller buildings interior space

    How do automatic doors help smaller buildings make better use of interior space?

    • A Their panels open outward to create a wider passage.
    • B They replace all interior walls with movable panels.
    • C They use sound signals to decide how much space is available.
    • D They keep the door open at all times inside small buildings.
    • E Their side-sliding panels avoid the clearance required by swing doors.
    • F They make buildings unnecessary by reducing the area they occupy.
    显示答案与解析 收起答案与解析

    正确答案:E

    该项压缩了完整逻辑:automatic doors open to the side,panels slide across one another,因而 smaller buildings need not clear the way for a large sticking-out door。avoid the clearance required by swing doors 是对 without having to clear the way 的准确释义。障碍在于 clearance 并非原句原词,考生必须将门扇的运动方式转换为占地空间这一功能后果。

    反向画门 时间紧张时,利用 smaller buildings 直接定位 第3段,并执行“反向画门”法:不需要逐句翻译,只在脑中画出 swing door 的摆动扇形,再画出 side-sliding panels 的横向移动。随后看哪个选项描述了消除摆动预留区的机制。这个图像核验比逐词比对更快,正确项会与画面完全一致。

  4. 第 4 段 定位词 pressure-sensitive mat busy street

    Why is a pressure-sensitive mat preferable to a motion-sensored door on a busy street?

    • A It detects movement from a greater distance than other sensors.
    • B It keeps the door permanently closed in crowded areas.
    • C It produces a louder sound to warn passers-by.
    • D It allows every passer-by to open the door more quickly.
    • E It is the only sensor type suitable for commercial buildings.
    • F It limits activation to a defined area instead of responding to passing pedestrians.
    显示答案与解析 收起答案与解析

    正确答案:F

    该项整合了两层信息:motion-sensored door 会 constantly open for passers-by,而 pressure-sensitive mat 可 limit the surveyed area。defined area 等义改写 surveyed area,responding to passing pedestrians 概括 constantly opening for passers-by。障碍在于原文没有直接写出 mat 不会对行人反应,考生需要根据“限定检测区域”与“路人经过街边”的空间关系作出受文本支持的推论。

    街边误触发测试 最快可用“街边误触发测试”。由 pressure-sensitive mat 和 busy street 直接定位 第4段,然后把每个选项代入一个画面:大量 passers-by 从门前经过,系统会不会 repeatedly open?能把触发限定在真正踩入区域的正确项通过测试;凡是扩大 movement detection、服务 every passer-by 或永久关闭的选项,都立即淘汰。

STRUCTURE · 篇章结构

4 个意群的说明文骨架

按说明文 的行文骨架切分意群,每个意群标注它覆盖的段落与对主旨的作用——逐段读完后回到这里俯瞰全篇,能看清作者为什么按这个顺序行文。

  1. 自动门的核心价值与实用意义

    这个 opening paragraph 直接点明了 automatic doors 的两大 essential benefits:一是 improving disabled access,让残障人士能更方便地 access buildings;二是 providing general convenience 给商业建筑带来便利。whole welcoming experience 从 without the need to be touched 这个 feature 开始,immediately establishes 了说明对象的 practical value。

    作为 expository text 的 introduction part,这个意群 sets the stage by presenting 自动门的 primary benefits,为后文 detailed explanation 做好铺垫。它用 welcoming 这个 emotional word 搭配 essential 这个 functional term,既吸引 reader's attention 又明确了 topic focus,符合说明文 engaging opening 的特征。

    引出说明对象并明确核心功能
  2. 自动门的历史发展与实际应用演变

    这个意群 traces back 自动门的 historical timeline,从 1960 年作为 commercial product emergence,到最初 six years previously 的 invention by Dee Horton and Lew Hewitt。重点是 transformation from novelty feature to practical necessity,especially highlighting their role in crowd management during busy times or emergencies,showing how their benefits have extended 在 technologically advanced world 中。

    作为说明文的 background information section,这个意群 provides historical context 让读者理解 how automatic doors evolved。通过 started out as novelty 到 benefits have extended 的 narrative arc,它展示了 practical applications 的扩展过程,特别强调了 crowd management function,这为理解 why these doors are essential 增加了 temporal depth 和 practical dimension。

    补充历史背景与应用场景拓展
  3. 自动门的空间优势与类型多样性

    这个意群 explores spatial advantages of automatic doors,especially how sliding mechanism 能够 reduce total area occupied。通过对比 swing doors,说明 sliding panels 如何 allow smaller buildings to maximize usable space。同时 introduces the variety of automatic door types,pointing out 虽然 each relies on specific signals,但 main principles remain the same,为下文的 technical explanation 做好铺垫。

    这个意群在说明文中起到 bridging function,一方面 elaborates on space efficiency benefit 提到的 practical advantage,用 concrete comparison(sliding vs swing)让读者 visualize the difference;另一方面 sets up 后续的 technical analysis by mentioning different types 和 signals。这种 transitional section 既 deepens previous points 又 prepares for detailed mechanism explanation,体现说明文 logical progression。

    阐释空间效率优势与技术多样性
  4. 自动门传感系统的工作原理与环境适配

    这个 concluding section 深入 technical mechanism,explaining how each system analyzes light, sound, weight or movement as signals。关键在于 sensor types are chosen to complement different environments 这个 adaptive principle,用 busy street example 对比 motion-sensored door 和 pressure-sensitive mat,illustrating how appropriate sensor selection 取决于 specific contexts 来 limit surveyed area 避免 constantly opening。

    作为说明文的 detailed explanation section,这个意群 delivers technical substance by breaking down how automatic doors actually work。通过 concrete example(busy street scenario)和 comparative analysis(motion-sensored vs pressure-sensitive),它让 abstract principle of sensor selection 变得 tangible and understandable。这个 closing segment 完成了从 general benefits 到 specific mechanisms 的 complete expository arc,给读者 comprehensive understanding。

    详解传感技术的工作机制与选型原则
MAIN IDEA · 速判主旨

4 步定位这篇文章的主旨

不读完全篇也能锁定主旨——以下 4 步按2024年考研英语一真题 这篇原文的实际行文顺序给出,每步说明看哪里、看出什么,可直接迁移到其他考研英语文章。

  1. 首段首句定位主题对象 P1

    说明文的 first paragraph 通常会 introduce the main topic,首句往往会用 general statement 来 establish 文章要解释的 subject。这里 automatic doors 和它的 welcoming nature 以及 improving disabled access 就是整篇文章的 central focus。

  2. 各段首句提取支撑维度 P2 P3 P4

    说明文的结构特征是 topic + aspects breakdown。每段的 first sentence 或 first two sentences 通常会 introduce 该段的 specific aspect。当你看到 第2段 的 began to emerge 和 invented,第3段 的 making access easier 和 difference in the way,第4段 的 analyses the light, sound,就能快速识别出这是在 explain 不同的 facets。

  3. 功能解释语言标记识别 P1 P2 P3 P4

    说明文的核心 purpose 是 to inform 和 to explain。当文章中反复出现 help、act as、allow、complement 这类 functional verbs,以及 how、what、each type 这类 explanatory structures 时,就能确认这是 expository writing。这些 linguistic features 提示我们文章主旨应该包含 explanation of workings 或 benefits。

  4. 三要素整合陈述 P1 P2 P3 P4

    主旨判断的最后一步是 synthesis。说明文的主旨必须包含三个 components:what is being explained(the object)、what aspects are covered(the dimensions)、和 why it matters(the significance)。这篇文章的 complete main idea 是:解释 automatic doors 的运作、历史、优势和技术,强调其 accessibility 和 practical benefits。

主旨信号词 essential P1 began to emerge P2 help P1 types of P3 how P4

MAIN IDEA · 主旨

这篇文章在说什么

这篇说明文解释了自动门的工作原理、自1960年以来的历史发展,以及它们的实际优势,包括改善残障人士的无障碍通行、通过滑动机制提高空间利用效率,以及通过各种传感器技术在繁忙区域实现人群管理。
This expository text explains how automatic doors work, their historical development since 1960, and their practical benefits including improved accessibility for disabled people, space efficiency through sliding mechanisms, and crowd management in busy areas through various sensor technologies.
WORD INFERENCE · 生词推断

3 个生词的上下文推断

不查词典,只用文中线索推出词义——每个词给出推断出的释义与 完整推理链。已收录进考研英语高频真题词集的单词可点击进入词条页。

  • novelty 新奇、新颖(强调因新而引人注意,但未必实用)

    我们来串联这些 clues。首先,时间和对比的 structure 告诉我们,novelty feature 是 early stage 的特征,与后来的 practical benefits 相对。其次,它 modifies 'feature',说明这是在描述产品的 nature。最后,historical context 提示 1960 年代的 automatic doors 对人们来说是 unprecedented 的。将这三条 clues 结合:novelty 描述的是'新颖性、新奇性',指某物因为 newness 而引人注意,而不是因为 practical value。

    时间轴对比定位法
  • vicinity 邻近区域、附近范围

    让我们整合这些 evidence。Grammar structure 通过 possessive 'its' 和 preposition 'in' 确立了 vicinity 是个 spatial concept。Synonym relationship 中,surveyed area 直接解释了 vicinity 的含义,都是指 sensor 能 detect 的 scope。Morphology 的 -ity suffix 确认这是个 abstract noun。三条线索共同指向:vicinity 是指某个 reference point (这里是 door system) 周围的 area 或 region,特指 sensors 能 monitor 的范围。

    参照点空间定位法
  • complement 与...相配、补充、使适合

    综合这些 clues,我们可以建立这样的 reasoning chain:purpose structure 表明 complement 描述 sensor types 与 environments 的 intended relationship。Concrete examples 展示这种 relationship 的 essence 是 appropriateness 和 suitability,避免 mismatch。Morphological hint 提示可能有'使适配、使协调'的含义。因此,complement 在这里指'与...相配、补充、使协调',强调 sensors 要 fit 或 suit their operating environments。

    目的-例证反推法
RHETORIC · 修辞手法

5 处修辞手法与仿写

每处修辞给出它在本文的具体用法、同类信号词清单与一份可直接套用的 写作仿写建议——读完能认,也能写。

  • 举例子

    P4

    文章在 第4段 中通过 a busy street 和 motion-sensored door 的例子来 illustrate 不同环境需要选择 different sensor types。这个 concrete example 让读者能够 understand 为什么要根据 specific environments 来选择合适的 sensor technology,直接支撑了文章关于 automatic doors 如何通过 various sensor technologies 实现 practical applications 的主旨。

    信号词 for example for instance such as like take... as an example to illustrate a case in point

    仿写: 写 expository text 时,当你需要 explain 一个 abstract principle 或 technical concept,问自己:「什么样的 real-life situation 能最好地 demonstrate 这个道理?」选择 readers 容易 relate to 的场景。模版:「For example/instance, [具体场景] + would/might + [产生的问题/现象], + as [原因解释]. + [更合适的方案] + would be more appropriate/suitable to [解决方案的优势].」

  • 列数字

    P2

    文章在 第2段 开头使用了 precise numbers:1960 和 six years previously,明确指出 self-sliding doors 作为 commercial product 出现的 exact timeline。这些 specific dates 增强了文章的 credibility 和 accuracy,让关于 automatic doors 的 historical development 这部分 main idea 有了 solid factual foundation。

    信号词 1960 six years 数字+单位 百分比 倍数 分数

    仿写: 当你在 explain 某个事物的 development history 或 technical specifications 时,思考:「有哪些 concrete numbers 能让这个 information 更 precise?」可以是 dates, percentages, measurements 等。模版:「[事物] + began to/emerged as + [状态] + in [年份] + after being [动作] + [时间段] previously.」或「[事物] + has grown/increased by [具体数字/百分比] + since [时间点].」

  • 作比较

    P3

    第3段 中将 automatic doors 与 swing doors 进行了 direct comparison,强调 sliding mechanism 相比传统 swinging method 的 space-saving advantage。这个 contrast 直接支撑了文章主旨中关于 automatic doors 如何实现 space efficiency 的论点,让 readers 能 clearly see 新技术的 practical benefits。

    信号词 replacing unlike compared to in contrast to whereas while rather than instead of different from

    仿写: 写 expository text 介绍 new technology 或 method 时,问自己:「它 replaces 或 improves 什么 existing solution?两者的 key difference 在哪?」将 comparison 嵌入 explanation 中。模版:「Replacing [旧事物], [新事物] + allow/enable + [主语] + to [优势动作] + without having to [旧事物的缺点].」或「Unlike/Compared to [对象A], [对象B] + [差异动词] + in that [具体差异].」

  • 分类别

    P3 P4

    文章在 第3段 和 第4段 中对 automatic doors 进行了 categorization:先提到 many different types,然后按照 sensor types (light, sound, weight, movement) 进行分类,并说明不同 types 适用于 different environments。这个 classification 支撑了文章关于 various sensor technologies 如何在 different scenarios 中实现 practical applications 的主旨,让 complex system 的 explanation 变得 structured and systematic。

    信号词 types kinds categories classes varieties each different methods various forms be classified/divided into

    仿写: 当你需要 explain 一个有 multiple variations 的 system 或 concept 时,先 identify classification criteria,然后 systematically present each category。问自己:「这个事物可以根据什么 standard 分成几类?每类的 key feature 是什么?」模版:「There are many different types/kinds of [事物], with each [根据什么特征区分]. + Sensor types/Categories are chosen/classified based on [分类标准]. + For example, [类别A] + [特点], while [类别B] + [对比特点].」

  • 作诠释

    P1 P3

    第1段 开头用「There's nothing more welcoming than a door opening for you」来 interpret automatic doors 的 user experience,然后 elaborate 它们如何 improve disabled access 和 provide convenience。第3段 也 clarifies 「the difference in the way many of these doors open helps reduce the total area occupied」,解释 sliding mechanism 的 spatial benefit。这些 interpretations 将 technical features 转化为 understandable benefits,支撑文章关于 practical benefits 的主旨。

    信号词 help assist in in other words that is to say which means this allows as a result

    仿写: 在 introduce 一个 feature 或 concept 后,不要 assume readers automatically understand its significance。加一句 interpretation:「这意味着什么?为什么 important?」模版:「[陈述事实] + help/enable/allow + [受益对象] + to [具体益处], + [进一步解释为什么或如何实现].」或「The difference/feature in [某方面] + helps [动词] + [结果], with [补充说明].」

IMPLIED MEANING · 言外之意

4 处话里有话

作者没有明说、但靠信号词传递出来的态度与暗示——每处给出原文片段、信号词类型与解读。

  • 自动门从novelty到essential的地位转变

    P2
    They started out as a novelty feature, but as their use has grown, their benefits have extended within our technologically advanced world.

    对比类 started out as used to be once was initially originally at first in the beginning

    表面说自动门 started out as novelty(新奇玩意儿),但通过 but as their use has grown 这个 contrast,作者的 implication 是:自动门已经从 trivial gadget 变成了 essential technology。这个 subtext 支撑文章主旨中 automatic doors 的 practical benefits 和 importance,为后文详述 benefits 做 groundwork,establish 自动门不再是 optional luxury 而是 necessary infrastructure 的 premise。

  • 传统swing doors的空间局限性问题

    P3
    Replacing swing doors, these allow smaller buildings to maximise the usable space inside without having to clear the way for a large, sticking-out door.

    对比类 Replacing instead of rather than as opposed to in place of substituting superseding

    表面只是说 automatic doors replace swing doors,但 implication 是:swing doors 有 significant space inefficiency problem(需要 clear large area for sticking-out door)。这个 subtext 强化文章主旨中 space efficiency 这个 key benefit,通过 implicit criticism of old technology 来 highlight automatic doors 的 practical value,especially for smaller buildings 这个 specific scenario。

  • busy street环境下motion sensor的不适用性

    P4
    For example, a busy street might not suit a motion-sensored door, as it would constantly be opening for passers-by.

    委婉表达 might not suit might not may not could be problematic not always suitable not ideal less appropriate

    表面说 might not suit,但 implication 非常 clear:motion sensor 在 busy street 会造成 malfunction(constantly opening 本质是 false triggers)。这个 subtext 支撑文章主旨中 various sensor technologies 需要 complement different environments 的观点,demonstrate sensor selection 不是 random choice 而是需要根据 specific context 做 strategic decision,reinforce 自动门系统的 sophistication 和 adaptability。

  • pressure-sensitive mat相比motion sensor的优越性

    P4
    A pressure-sensitive mat would be more appropriate to limit the surveyed area.

    对比词 more appropriate better suited preferable more effective superior more suitable advisable

    表面说 pressure mat is more appropriate,但 implication 是:它能 solve motion sensor 的 core problem(无法控制 surveyed area,导致 false triggers)。这个 subtext 完善文章主旨中 sensor types chosen to complement different environments 的论述,demonstrate 自动门系统的 problem-solving capability,show 技术设计的 thoughtful adaptation to real-world constraints。

AUTHOR ATTITUDE · 作者态度

作者态度:积极支持

结论先行:本文作者态度为积极支持( informative and appreciative)。下面是按步骤还原的判断过程与文中的态度信号词。

  1. 扫首句定体裁 P1 P2 P3 P4

    说明文的 author 通常不会发表强烈的个人情绪,但依然会通过 word choice(选词)透露出对所介绍事物的 positive 或 neutral 倾向——先锁定体裁,才能找对判断态度的维度。

  2. 圈评价词查极性比例 P1 P2 P3 P4

    说明文的作者往往借助 evaluative adjectives(如 essential、convenient、useful)来隐性表达立场。这类词比 explicit opinion(显性观点)更难察觉,但数量和分布能直接揭示作者的 attitude tendency(态度倾向)。

  3. 追 benefit 句型识立场 P1 P2 P3 P4

    说明文作者如果频繁使用以 benefit 为导向的句型,说明其 purpose 不只是 neutral description,而是在 highlighting advantages(强调优势),体现了 supportive attitude(支持性态度)。

  4. 三维综合定最终态度 P1 P2 P3 P4

    说明文的 author attitude 很少是纯粹的 neutral(完全中立),而是常常以 informative 为表层,以 positive 或 critical 为底色。本文无任何 negative signal,benefit 描述贯穿全篇,因此态度归类为 积极支持 而非 客观中立。

文中的态度信号词

  • welcoming P1

    'welcoming' 是一个带有强烈 positive connotation 的 adjective,出现在文章 opening sentence 的 superlative 结构 'nothing more welcoming than' 中,语气为全文最强——作者用最高级开篇,奠定了整篇对 automatic doors 的 positive tone,让读者在获取 information 之前就先感受到作者的 appreciative attitude。

    同类词 pleasing inviting delightful reassuring

  • essential P1

    'essential' 是高强度的 positive evaluative adjective,表示'不可或缺的'。作者用它直接修饰 automatic doors 在 disabled access 和 commercial convenience 方面的 role,说明作者认为这项技术具有 fundamental importance(根本性重要性),远超普通 neutral description 的范畴,透露出明确的 supportive stance。

    同类词 crucial vital indispensable necessary key

  • particularly useful P2

    'particularly useful' 由 intensifier('particularly')加 positive adjective('useful')构成,作者用它来强调 automatic doors 在 busy locations 和 emergency 场景下的 specific advantage。这种'副词强化 + 正面形容词'的组合,在说明文中是作者 highlighting 某一 benefit 的标志性句式,态度信号极为清晰。

    同类词 especially helpful notably effective highly beneficial remarkably convenient

  • benefits have extended P2

    'benefits have extended' 使用了 noun 'benefits'(正面词)加 verb 'extended'(扩大、延伸),暗示 automatic doors 随时代发展越来越好——作者不仅介绍 fact,还通过选用 progressive / expansive 动词来表达对这一技术 positive trajectory(正向发展轨迹)的认可,是 appreciative attitude 的 implicit expression。

    同类词 advantages have grown merits have expanded value has increased gains have multiplied

  • maximise the usable space P3

    'maximise' 是一个 goal-oriented verb,暗含'达到最优'的 positive value judgment。作者用它描述 automatic doors 对 space 的贡献,说明作者在 framing 这一功能时,选择了'效益最大化'的视角,而非仅仅描述'节省空间'这一 neutral fact——这种主动选词体现了 appreciative attitude。

    同类词 optimise the available area make full use of best utilise enhance spatial efficiency

  • more appropriate P4

    'more appropriate' 是 comparative adjective,作者用它在 第4段 的 example 中评价 pressure-sensitive mat 相比 motion-sensored door 更适合特定场景——这不是纯粹的 neutral description,而是作者在做 comparative evaluation(比较评价),体现出作者对 automatic door technology 系统设计的 informed appreciation(内行式认可),说明作者对这一领域持有 positive and knowledgeable attitude。

    同类词 better suited more fitting more effective more suitable

GENRE · 速判体裁

30 秒判定这是一篇说明文

体裁决定读法与出题套路。以下判断步骤与标志词全部以本文为例,可直接迁移到其他考研英语 真题文章。

如何快速判断这是一篇说明文?

  1. 首句定性法 P1

    说明文的 primary purpose 是 to inform and explain,所以 opening 会直接 present 说明对象。比如这篇文章 第1段 开头就 introduce automatic doors 这个 object,而议论文会 present 一个 controversial issue 或 arguable claim,新闻报道则会用 lead paragraph 交代 who、what、when、where 的 breaking news。

  2. 段落关系检测 P2 P3 P4

    说明文常用 organizational patterns 包括 time sequence、process description、category division 等来 structure content。这篇文章 第2段 用 historical development('invented six years previously','started out as a novelty'),第3段 讲 types and mechanisms,第4段 讲 sensor classification,是典型的 expository organization。议论文用 thesis-supporting arguments-counterarguments 的 logical structure,新闻用 most newsworthy facts 在前的 inverted pyramid。

  3. 语气词汇筛查 P1 P2 P3 P4

    说明文追求 objectivity,用 declarative sentences 陈述 facts('automatic doors are essential','sensor types are chosen'),避免 emotional appeals 或 subjective judgments。议论文会用 evaluative adjectives('absolutely necessary','deeply flawed')和 rhetorical devices 来 persuade readers。新闻报道用 attribution('according to officials')和 quotes 来 maintain journalistic objectivity,但会有 news angle 和 timeliness indicators('today','breaking')。

  4. 三维验证法 P1 P2 P3 P4

    三个维度同时验证能确保 accurate identification:Purpose(inform vs. persuade vs. report),Structure(expository patterns vs. argumentative logic vs. news pyramid),Language(factual neutrality vs. persuasive rhetoric vs. journalistic attribution)。本文在这三个 dimensions 都符合 expository writing 的 characteristics,因此是 说明文而非议论文或新闻报道。

哪些词暴露了说明文体裁?

  • automatic doors are essential in P1 事物属性功能描述词 are essential in are useful for serve to function as are designed to
  • began to emerge as P2 说明顺序与例证词 began to emerge started out as originated from developed into evolved from
  • There are many different types of P3 说明对象定义解释词 there are many types of can be classified into falls into several categories comes in various forms consists of
  • helps reduce P3 事物属性功能描述词 allows to enables facilitates contributes to aids in
  • the main principles remain the same P3 说明对象定义解释词 the principle is the mechanism works by the basic concept involves operates on the principle of the underlying logic is
  • analyses the light, sound, weight or movement P4 事物属性功能描述词 analyses detects senses monitors measures
  • For example P4 说明顺序与例证词 for example for instance such as like including
  • Sensor types are chosen to complement P4 事物属性功能描述词 are chosen to are selected based on are designed to match are tailored to are adapted for
SENTENCE INSIGHTS · 句子精讲

7 句真题句逐层精讲

下列真题句各有独立的句子解析页——中文翻译、结构树逐层拆解、成分与时态、考点讲解与真题高频词。点击句子进入完整解析。

FAQ · 常见问题

关于 How Automatic Door Mechanisms Work 的常见问题

2024年考研英语一真题 Section I 文章 How Automatic Door Mechanisms Work 的原文出自哪里?
How It Works Daily网站2021年3月25 日文章 How Automatic Door Mechanisms Work(自动门装置的工作原理)。
2024年考研英语一真题文章 How Automatic Door Mechanisms Work 的主旨是什么?
2024年考研英语一真题 Section I 文章 How Automatic Door Mechanisms Work 说明文解释了自动门的工作原理、自1960年以来的历史发展,以及它们的实际优势,包括改善残障人士的无障碍通行、通过滑动机制提高空间利用效率,以及通过各种传感器技术在繁忙区域实现人群管理。(英文表述:This expository text explains how automatic doors work, their historical development since 1960, and their practical benefits including improved accessibility for disabled people, space efficiency through sliding mechanisms, and crowd management in busy areas through various sensor technologies.)
How Automatic Door Mechanisms Work(2024年考研英语一真题文章)是什么体裁?难度如何?
体裁为说明文,作者立场是积极支持(informative and appreciative)。CEFR 难度 B2,全文 271 词、4 段;在考研英语一全部 102 篇真题文章中,B2 级共 7 篇(占 7%)。
2024年考研英语一真题文章 How Automatic Door Mechanisms Work 的篇章结构是怎样的?
全文 4 段按说明文骨架分为 4 个意群:第1段——自动门的核心价值与实用意义;第2段——自动门的历史发展与实际应用演变;第3段——自动门的空间优势与类型多样性;第4段——自动门传感系统的工作原理与环境适配。
How Automatic Door Mechanisms Work 一文的作者态度是什么?
作者态度是积极支持(informative and appreciative)。判断路径:扫首句定体裁 → 圈评价词查极性比例 → 追 benefit 句型识立场 → 三维综合定最终态度;文中的态度信号词包括 welcoming(第1段)、essential(第1段)、particularly useful(第2段)、benefits have extended(第2段)、maximise the usable space(第3段)、more appropriate(第4段)。
2024年考研英语一真题文章 How Automatic Door Mechanisms Work 中有哪些值得积累的生词?
按文中出现顺序共 3 个:novelty(新奇、新颖(强调因新而引人注意,但未必实用))、vicinity(邻近区域、附近范围)、complement(与...相配、补充、使适合),每个词的词义都可以由文中上下文线索推断得出。

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