揽瓜阁训练营 第144天（含CR，RC和DI题目）

小白斩鸡

之前大家对揽瓜阁精读的反馈很好，就想着自己的时间开始把一些精读的文章根据JJ出题目～ 然后focus上线，IR需求 大家也大。就想着 把揽瓜阁的阅读 逻辑 IR 都放在这贴里打卡

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RC题源：揽瓜阁精读的文章+机经的题目
CR题源：本月中文JJ改编
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1.CR
In a certain African country, cooking bananas have long been a staple food. However, these bananas are particularly susceptible to a certain pest that can ruin the crop. To address this issue, scientists have proposed introducing a genetically modified variety of cooking banana that includes a protein, known as crystal (C) protein, which effectively prevents the pest from damaging the bananas. While introducing genetically modified crops often raises health concerns, proponents argue that this is not an issue in this case because the C protein is abundant in rice, which has been consumed for thousands of years by people in Asian and African countries without any adverse effects.
Which of the following, if true, would most weaken the argument that the genetically modified cooking bananas containing C protein are safe for consumption?
(A) The C protein is structurally different in rice and in the genetically modified cooking bananas.
(B) The levels of C protein in the genetically modified cooking bananas are significantly higher than those found naturally in rice.
(C) Consuming high levels of C protein may inhibit the absorption of certain essential nutrients found in cooking bananas.
(D) Some people in Asian countries have been found to have allergies to rice containing C protein.
(E) The genetic modification process used to introduce C protein into cooking bananas may have unintended effects on other genes within the banana genome.

In an effort to reduce the risk of theft, a university has decided to replace cash transactions at its cafeteria with a card payment system. Under the new system, students will use their university ID cards, which include their names and photographs, to make purchases. The university believes that this will deter potential thieves because cafeteria staff will be able to verify that the person using the card matches the photo on the card.
Which of the following, if true, would most weaken the university's argument that the new card payment system will reduce the risk of theft in the cafeteria?
(A) The university has not allocated additional funds to train cafeteria staff in card verification procedures.
(B) Students who lose their ID cards will be required to pay a fee to obtain a replacement card.
(C) The card payment system will also be used for other campus services, such as the library and gym facilities.
(D) Vending machines in the cafeteria, which account for a significant portion of sales, will also accept the new ID cards for payment.
(E) The university has plans to expand the card payment system to include off-campus vendors in the future.

答案:
CD


2.DI
Passage 1:
The proclivity of investors to succumb to cognitive biases, a phenomenon that has long captivated the attention of behavioral economists, has far-reaching implications for the efficiency and stability of financial markets. These biases, which often operate on a subconscious level, can lead investors to make decisions that deviate from the tenets of rational choice theory, resulting in suboptimal outcomes for both individual investors and the broader economy. One such bias, known as the home bias, stems from an irrational predilection for the familiar and induces investors to allocate a disproportionate share of their portfolio to domestic securities, even when the benefits of international diversification are well-established. This bias is particularly pervasive among retail investors, who may lack the expertise or resources to effectively navigate foreign markets, but it can also influence the decisions of institutional investors, who may be swayed by political or cultural factors. The status quo bias, another common cognitive pitfall, engenders a propensity among investors to maintain their extant investment strategies, even in the face of changing market conditions or new information that would dictate a divergent course of action. This bias can manifest in a reluctance to sell underperforming assets, a phenomenon known as the disposition effect, or in the tendency to passively acquiesce to default investment options, such as those offered by employer-sponsored retirement plans. The availability bias, which prompts investors to accord undue weight to recent and salient information, can exacerbate the impact of short-term market fluctuations on investment decisions. For example, during periods of rapid price appreciation, investors may extrapolate recent trends into the future, leading to speculative bubbles and eventual market corrections. Conversely, during market downturns, the availability bias may lead investors to overestimate the likelihood of further losses, resulting in panic selling and the realization of substantial losses. Finally, the overconfidence bias, which afflicts investors who harbor an irrational belief in their ability to consistently outperform the market, can lead to excessive risk-taking and a disregard for the importance of diversification. This bias is often accompanied by the illusion of control, whereby investors overestimate their ability to influence the outcome of their investments, and the self-attribution bias, which leads investors to attribute their successes to their own acumen while blaming external factors for their failures. Collectively, these cognitive biases pose a significant challenge to the effective functioning of financial markets, as they can contribute to the mispricing of assets, the misallocation of capital, and the amplification of market volatility. While regulatory interventions and investor education initiatives can help to mitigate the impact of these biases, it is ultimately the responsibility of individual investors to cultivate an awareness of their own cognitive limitations and to develop strategies for overcoming them.

Passage 2:
A recent study, conducted by a team of researchers from the University of Oxford and the London School of Economics, sought to examine the prevalence and impact of cognitive biases among a sample of 10,000 ardent supporters of English Premier League football clubs. The study, which was designed to shed light on the intersection between emotional attachment and financial decision-making, presented participants with a choice between investing in the publicly traded stock of their favored club or a globally diversified investment vehicle. The results of the study revealed a striking propensity among the supporters to allocate a substantial portion of their investment capital to their club's stock, with 70% of participants opting for this course of action and an average allocation of 60% of their portfolio. This trend persisted despite the availability of historical data indicating that Premier League club stocks had experienced a relatively modest 25% appreciation over the preceding year, a rate of return that was broadly in line with the performance of the wider market. However, the investment decisions of the supporters proved to be misguided, as the subsequent three-year period witnessed a marked underperformance of the club stocks relative to the globally diversified portfolio. On average, the club stocks trailed the diversified portfolio by a staggering 15% per annum, a differential that had profound implications for the wealth of the supporters. Those who had invested £10,000 in their club's stock at the outset of the study would have seen their holdings diminish to a mere £8,145 after three years, representing a loss of nearly 20% of their initial investment. In contrast, those who had opted for the diversified portfolio would have enjoyed a substantial appreciation of their wealth, with their holdings increasing to £11,576 over the same period. The stark divergence in outcomes between the two groups of investors can be attributed, in large part, to the influence of cognitive biases on the decision-making process of the club supporters.The home bias, which reflects an irrational preference for familiar investments, likely played a significant role in the supporters' decision to allocate a disproportionate share of their portfolio to their club's stock. This bias may have been reinforced by the emotional attachment that many supporters feel towards their club, leading them to view the stock as a tangible expression of their loyalty and support. The availability bias, which leads investors to place undue emphasis on recent and salient information, may have also contributed to the supporters' investment decisions. The 25% appreciation in Premier League club stocks over the preceding year, while relatively modest by historical standards, may have been viewed by the supporters as evidence of the clubs' financial strength and growth potential. This perception may have been reinforced by the extensive media coverage and public interest surrounding the clubs, which could have made the recent stock price gains appear more significant than they actually were. The overconfidence bias, which leads investors to overestimate their ability to make accurate predictions about the future performance of their investments, may have also played a role in the supporters' decision-making process. The emotional attachment that many supporters feel towards their club may have led them to believe that they possessed unique insights into the club's prospects, causing them to disregard objective data and analysis that might have pointed to the risks of overconcentration in a single stock. Finally, the status quo bias, which leads investors to maintain their existing investment strategies even in the face of new information or changing circumstances, may have made it difficult for the supporters to adjust their portfolios in response to the underperformance of the club stocks. Having made an initial decision to invest heavily in their club's stock, the supporters may have been reluctant to admit that they had made a mistake and take steps to reduce their exposure. The study's findings have important implications for both individual investors and policymakers. For individual investors, the results underscore the importance of maintaining a diversified portfolio that is not overly concentrated in any single stock or sector. While the emotional appeal of investing in a beloved sports team or other familiar entity may be strong, the risks of such a strategy are simply too great to ignore. For policymakers, the study highlights the need for continued efforts to promote financial literacy and investor education, particularly among vulnerable populations who may be more susceptible to the influence of cognitive biases. By empowering individuals to make informed and rational investment decisions, policymakers can help to promote the stability and efficiency of financial markets, while also protecting the wealth and well-being of individual investors. Ultimately, the study serves as a powerful reminder of the complex interplay between emotion, cognition, and decision-making in the world of finance. While the allure of investing in a cherished sports team or other beloved institution may be strong, the cold, hard reality of the market demands a more dispassionate and disciplined approach. Only by recognizing and overcoming the influence of cognitive biases can investors hope to achieve their long-term financial goals and secure their future prosperity.

Questions:
1. Which of the following best describes the primary purpose of the first passage?
A. To provide a comprehensive overview of the various cognitive biases that can influence investment decisions
B. To argue that cognitive biases are the most significant factor contributing to market inefficiencies
C. To explore the specific ways in which cognitive biases can lead to suboptimal investment outcomes
D. To suggest that regulatory interventions are the most effective means of mitigating the impact of cognitive biases

2. According to the first passage, which of the following is a consequence of the home bias?
A. Investors may allocate a disproportionate share of their portfolio to domestic securities
B. Investors may be reluctant to sell underperforming assets
C. Investors may overestimate the likelihood of further losses during market downturns
D. Investors may attribute their investment successes to their own acumen

3. The second passage suggests that the emotional attachment of Premier League club supporters to their favored teams may have:
A. Helped them to make more rational investment decisions
B. Led them to view their club's stock as a tangible expression of their loyalty and support
C. Caused them to be more attentive to objective data and analysis about their club's financial prospects
D. Encouraged them to maintain a more diversified investment portfolio

4. Which of the following cognitive biases is most directly implicated in the tendency of investors to extrapolate recent price trends into the future?
A. Home bias
B. Status quo bias
C. Availability bias
D. Overconfidence bias

5. According to the second passage, which of the following statements about the performance of Premier League club stocks is true?
A. They outperformed the globally diversified portfolio over the three-year period following the study
B. They appreciated by 25% over the year preceding the study, which was significantly higher than the wider market
C. They underperformed the globally diversified portfolio by an average of 15% per annum over the three-year period following the study
D. They were more volatile than the globally diversified portfolio but generated similar returns over the long term

6. The second passage implies that the overconfidence bias may have led Premier League club supporters to:
A. Overestimate the potential risks associated with investing in their club's stock
B. Believe that they possessed unique insights into their club's financial prospects
C. Make investment decisions based on objective data and analysis
D. Underestimate the importance of maintaining a diversified investment portfolio

7. Which of the following best describes the main conclusion of the second passage?
A. The influence of cognitive biases on investment decisions can be entirely eliminated through investor education and regulatory interventions
B. The emotional attachment that investors feel towards a particular stock or sector is always detrimental to their financial well-being
C. Maintaining a diversified investment portfolio is the most effective way for individuals to mitigate the impact of cognitive biases on their financial outcomes
D. The underperformance of Premier League club stocks relative to the broader market is likely to persist indefinitely

8. The first passage suggests that the self-attribution bias can lead investors to:
A. Take excessive risks in their investment decisions
B. Attribute their investment successes to their own skills and knowledge
C. Overestimate the degree to which they can control the outcomes of their investments
D. Disregard the importance of diversification in their investment strategies

9. According to the second passage, the study's findings underscore the importance of:
A. Encouraging investors to allocate a significant portion of their portfolio to stocks with which they have an emotional connection
B. Promoting financial literacy and investor education, particularly among vulnerable populations
C. Discouraging individuals from investing in publicly traded sports teams or other familiar entities
D. Relying primarily on media coverage and public interest when making investment decisions

10. Which of the following statements best summarizes the overall message of both passages taken together?
A. Cognitive biases are the primary driver of market inefficiencies and investor losses
B. Regulatory interventions are the most effective means of promoting rational investment decision-making
C. Emotional attachment to a particular stock or sector is always incompatible with financial success
D. Recognizing and overcoming the influence of cognitive biases is essential for long-term investment success

1. A
2. A
3. B
4. C
5. C
6. B
7. C
8. B
9. B
10. D


3.RC
OTHER than being an ingredient of the more recherché sorts of salad, herbal tea or wine, dandelions are pretty useless plants. Or, at least, they were. But one species, a Russian variety called Taraxacum kok-saghyz (TKS), may yet make the big time. It produces molecules of rubber in its sap and if two research programmes, one going on in Germany and one in America, come to fruition, it could supplement—or even replace—the traditional rubber tree, Hevea brasiliensis.

Despite the invention of synthetic rubbers, there is often no good substitute for the real thing, for nothing artificial yet matches natural rubber's resilience and strength. This is because natural-rubber molecules, the product of a stepwise synthesis by enzymes, have a more regular structure than the artificial ones made by chemical engineering. Around a fifth of an average car tyre is therefore made of natural rubber. In an aeroplane tyre that figure can be more than four-fifths. Moreover, the price of synthetic rubber is tied to that of the oil from which it is made, rendering it vulnerable to changes in the oil price. Because oil is likely to become more costly in the future, natural rubber looks an attractive alternative from an economic point of view as well as an engineering one.

Natural rubber has problems, though. Growing Hevea in the Americas is hard. A disease called leaf blight means the trees have to be spaced widely. Even in Asia, currently blight-free, planting new rubber trees often means cutting down rainforest, to general disapproval. And trees, being large, take time to grow to the point where they can yield a crop. A smaller plant that could be harvested for its rubber therefore has obvious appeal.

One proposal is to use guayule, a shrub that grows in arid regions and produces rubber that is free from allergenic proteins, which makes it useful for items such as surgical gloves. Desert plants, however, tend to be slow growing—guayule takes two years to mature. Yulex, a firm that has commercialised guayule, gets an annual crop of 400 kilograms per hectare. Hevea can yield four or five times that figure. Which is where TKS could come in. Dandelions are regarded as weeds for a reason—they are robust, fast-growing plants that can be pulled up for processing and resown easily, possibly yielding two harvests a year. If they could be turned into usable crops, they could outstrip even Hevea.

To this end, Christian Schulze Gronover of the Fraunhofer Institute for Molecular Biology and Applied Ecology in Aachen, Germany, and his colleagues have identified the genes that allow TKS to produce usable rubber. In particular, they have discovered an enzyme called polyphenoloxidase that is responsible for making its rubbery sap coagulate.

From the plant's point of view this coagulation is a good thing. The evolutionary purpose of rubber, and the reason why it has appeared independently in plants as diverse as trees, guayule and dandelions, is that it gums up the mouthparts of herbivorous insects. Human users, however, do not want it to coagulate too soon, and Dr Schulze Gronover has found a way to switch polyphenoloxidase off, using a technique called RNA interference. This intercepts and destroys the molecular messengers that carry instructions from the polyphenoloxidase gene to make the enzyme, meaning that rubber can be extracted more easily from the plant.

Meanwhile, in America Matthew Kleinhenz of Ohio State University is working on increasing the yield of rubber from TKS. Dr Kleinhenz is doing things the old-fashioned way, growing different strains of TKS, grinding up the roots (where most of the sap is found) to see which have the highest rubber content, and crossbreeding the winners. His aim is to create a plant that is both high-yielding and has roots chunky enough to be harvested mechanically by the sort of device now used to pick carrots.

Combining the two approaches—high-tech bioengineering and low-tech plant breeding—may produce that rarity in the modern world, a whole new crop species. It would also mark a step on a journey that some see as the way forward: a return to the use of plant-based products that have, briefly, been overshadowed by the transient availability of cheap oil.

1. The passage suggests that the development of TKS as a commercially viable source of natural rubber would likely have which of the following effects?
(A) A reduction in the market price of natural rubber due to increased supply
(B) A decrease in the demand for synthetic rubber as manufacturers switch to cheaper natural alternatives
(C) An increase in the number of products that use natural rubber instead of synthetic substitutes
(D) A shift in the geographic distribution of rubber production, with TKS being grown primarily in temperate regions
(E) An acceleration of the trend toward using sustainable, plant-based materials in industry

2. The author's attitude toward the research being conducted on TKS can best be described as:
(A) Skeptical about the potential for TKS to replace Hevea brasiliensis as a major source of natural rubber
(B) Optimistic about the prospects for developing TKS into a viable alternative to Hevea, while acknowledging the challenges involved
(C) Dismissive of the idea that genetic engineering could play a significant role in improving TKS as a rubber crop
(D) Unconvinced that there is a need for alternative sources of natural rubber, given the long history of successful Hevea cultivation
(E) Highly critical of the environmental impact of large-scale TKS cultivation, particularly in ecologically sensitive areas

3. According to the passage, one of the key challenges facing the cultivation of Hevea brasiliensis in the Americas is:
(A) The high cost of labor required for tapping and processing the rubber trees
(B) The lack of suitable land for establishing large-scale Hevea plantations
(C) The susceptibility of Hevea trees to a fungal disease known as leaf blight
(D) Competition from alternative cash crops that offer higher returns for farmers
(E) Government regulations that restrict the use of pesticides and other chemicals in rubber production

4. Which of the following best describes the function of the seventh paragraph in the context of the passage as a whole?
(A) It introduces a new argument that challenges the central thesis of the passage.
(B) It provides a specific example to illustrate the potential advantages of TKS over Hevea brasiliensis.
(C) It offers a counterpoint to the optimistic tone of the preceding paragraphs, highlighting the limitations of TKS as a rubber crop.
(D) It summarizes the key points made in the passage and suggests directions for future research on alternative rubber sources.
(E) It shifts the focus of the passage from the scientific aspects of TKS development to the broader economic and social implications.

5. Based on the information in the passage, which of the following factors is likely to be most important in determining whether TKS becomes a major source of natural rubber?
(A) The ability to modify TKS genetically to increase its rubber content and improve its growth characteristics
(B) The development of efficient methods for extracting and processing rubber from TKS plants
(C) The identification of TKS strains that are best suited to the growing conditions in different regions
(D) The willingness of farmers to adopt TKS as a new crop and dedicate land to its cultivation
(E) The level of funding and institutional support for research on TKS and other alternative rubber sources

6. The author's discussion of guayule in the fourth paragraph serves primarily to:
(A) Highlight the diversity of plant species that are capable of producing natural rubber
(B) Identify a key weakness of guayule as a potential alternative to Hevea brasiliensis
(C) Suggest that TKS and guayule could play complementary roles in meeting the global demand for natural rubber
(D) Argue that the success of guayule as a rubber crop depends on the development of improved processing methods
(E) Emphasize the importance of selecting rubber-producing plants that are well-suited to local growing conditions

7. The passage is most likely an excerpt from which of the following?
(A) A scientific journal article reporting the results of a specific study on TKS
(B) A government report assessing the economic viability of different natural rubber sources
(C) A popular science magazine article discussing recent developments in rubber production
(D) An industry white paper promoting investment in alternative rubber crops
(E) A book chapter exploring the history and future of natural rubber production

8. The author's concluding statement about "a return to the use of plant-based products" (last paragraph) primarily serves to:
(A) Summarize the main points made in the passage about the potential of TKS as a rubber source
(B) Introduce a new idea that is not fully explored in the passage but suggests potential areas for further research
(C) Place the development of TKS as a rubber crop in the broader context of a shift toward sustainable, bio-based materials
(D) Question the long-term viability of relying on plant-based products as alternatives to synthetic materials
(E) Argue that the move toward plant-based products is driven more by nostalgia than by sound scientific and economic reasoning

CBCBDBCC

jeilham

000000000000000000000000

狗熊要吃肉

CA

为了G700

Day144 CR
第一题，选C，削弱拥护者关于蛋白C是有益健康的结论。
P：引进一种蛋白C，能有效的避免害虫破坏香蕉，但是有人担心不利于健康。
C：拥护者认为不会，因为大米也包含了很多蛋白C，亚洲和非洲人吃大米没有副作用。

A.不同不能说明有害健康。
B.C level高不能说明有害健康。
C.削弱，会阻止其他营养的吸收，说明了其他害处。
D.亚洲人敏感不能说明非洲人的反应。
E.影响其他基因的未必有害健康。

第二题，选D，削弱题。
P：为了减少偷盗，咖啡厅决定用卡代替现金付款，这样减少偷盗。
C：因为卡上有照片，学生能够根据照片来确认。

A.没有额外的资金去培训识别能力，不能直接削弱。
B.无关。
C.无关。
D.偷盗人可以在机器上购买，而且机器贩卖占有很大部份销售额。
E. 无关。

徐公子~

CR1
我的答案：C
正确答案：C
P1：科学家计划引入含C蛋白的香蕉，可以有效抵御虫害
P2：水稻中含有丰富C蛋白，亚洲和非洲人经过长期食用，并无副作用
C：吃含有C蛋白的转基因香蕉是健康的
任务类型：削弱
选项分析
A：转基因香蕉中的C蛋白的结果与水稻中的不同——不明确结构与健康的关系
B：转基因香蕉中的C蛋白含量显著高于水稻中的C蛋白含量——不明确含量高低是否与健康有关
C：摄入大量C蛋白的香蕉会限制人体对香蕉中其他对身体必要成分的吸收——缺少必须成分，影响健康
D：一些亚洲人对水稻中的C蛋白过敏
E：将C蛋白引入香蕉，可能会对基因产生副作用

CR2
我的答案：D
正确答案：D
P：学校餐厅员工会核对卡和持有者身份
C：卡支付系统可以降低偷盗风险
任务类型：削弱
选项分析
A：加强，培训餐厅人员
B：不能削弱，餐厅人员可以核对身份
C：不能削弱，餐厅人员可以核对身份
D：占餐厅收入重大部分的自动贩售机也支持卡支付——没有人工核对卡和持有者身份
E：不能削弱，餐厅人员可以核对身份

RC
我的答案：BBBEABAC
正确答案：CBCBDBCC

pooooooooh

144：C
CR1：一些非洲国家一直将香蕉作为主食，然而这些香蕉会吸引一种足以毁坏天地的害虫。为解决这个问题科学家计划将C蛋白添入该香蕉的转基因品种，这种蛋白可以防止虫害。但人们对于转基因食物有些健康担忧，支持者认为米饭中也含大量C蛋白，而亚洲和非洲人食用了千年也没有不良反应。
C：削弱题，削弱C蛋白的摄入安全性

A：C蛋白在米饭和在香蕉中的结构不同——无关
B：C蛋白在香蕉中的含量远超天然米饭——含量高不说明有害，无关
C：高水平的C蛋白可能阻碍香蕉中必要营养的吸收——有关
D：亚洲已经发现一些人对C蛋白过敏——个例无说服力
E：转基因过程中C蛋白可能会在不经意中影响香蕉的染色体——没讲结果

CR2：D
学校自助餐厅为了防贼，食用了ID卡就餐系统，校方相信这东西能有效震慑小偷。
C：削弱题 削弱该系统的作用

A：大学没用额外的经费培训员工使用系统——没培训并不是系统的问题
B：遗失饭卡的学生将花钱补办——无关
C：其他园地也将使用该系统——无关
D：自助餐厅的售卖机器中大部分售卖品也接受新ID的支付——似乎有关
E：大学有计划扩张该系统至学校以外——无关

Eunice12

我的选项：CD
正确选项：
第一题：削弱题
P：在某个非洲国家，煮香蕉是主食，但是香蕉容易受到某种害虫的影响。
P：为了解决这个问题，科学家提出引进转基因的新品种，包含C蛋白，能有效防止害虫损害香蕉
C：尽管转基因作物会有健康问题，但是这不成问题
P：因为大米富含C蛋白，人们已经食用多年而没有副作用
A:C蛋白在大米和转基因香蕉中不同
B:C蛋白含量更高——无关
C:削弱
D:反驳前提
E:影响有好有坏
第二题：削弱题
P：为了降低盗窃风险，大学决定在餐厅用卡支付系统替代现金交易
P：学生将会使用校园ID卡（有名字和照片）去支付
P：餐厅员工能验明使用卡的人与卡上的照片匹配
C：这将会震慑潜在窃贼
A:无关
B:无关
C:无关
D:核验不了是否匹配
E:无关

xuelin99

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xuelin99

D144
1.削弱题
P：香蕉遭虫害，要引入一种基因C，可以有效防止虫害，但引发了大家对健康问题的担心
C：支持者认为米饭里很多C，但亚非国家吃了很多年都没有健康问题
A：转基因香蕉的C和米饭里的C不一样，削弱
B：香蕉中C的含量远高于米饭，削弱
C：食用C会妨碍香蕉中其他重要的营养物质的吸收，无关
D：亚洲一些国家对C过敏
E：引入C的过程中可能对香蕉中其他的基因产生副作用
我的答案：A  正确答案：C

2.削弱题
P：学校咖啡厅选择使用校园卡支付来代替现金支付，支付时店员可核对本人和校园卡照片
C：这可以阻止潜在的小偷
A：学校没有分配资金来培训员工核对的程序，削弱
B：丢失补办校园卡需要额外付费，无关
C：校园卡支付也可以用在其他地方，无关
D：最常用的自动售卖机也支持校园卡支付，无关
E：学校计划进一步扩大校园卡支付范围，无关
我的答案：A  正确答案：D

setmefree1

DAY144
CR
E C在大米中也有，说明新加入的C无害，可能是加入C过程中对其他产生了不良影响，选项C是说抑制必要营养元素的摄入，但是不会导致安全食用问题，只是没有营养而已
D 自动贩卖机是食堂的一大部分，不用检验卡片和人脸的比对