原理其实很简单：通常选择题答案只有ABCD四个选项，四个字母在书写时略有不同A有三画，C只一画，BD虽都是两画，但B在书写时由于第二画有弯，耗时较D稍长。

Principle is very simple:Usually multiple-choice answers only ABCD four options,Four letter is A bit different when writing A three pictures,C is only a picture,Although BD are two pictures,But B due to the second picture is curved when writing,A D is less time consuming.

　　事实果真如此吗？近日，重庆晚报记者通过一组试验，发现听声辨答案有一定准确率，但在实际操作中难度也不小。

That is the case?In recent days,The chongqing evening news reporter through a set of tests,Find answers hearing bian has certain accuracy,But in practice the difficulty is not small.

　　试验人员

Test personnel

　　夏懿，女，26岁，家住渝中区两路口桂花景苑64号；何洋，女，20岁，重庆工商大学大二学生；重庆晚报记者

Xia Yi,female,26 years old,Osmanthus minhang district no. 64 in yuzhong district two crossroads;He Yang,female,Twenty years of age,Chongqing industry and commerce university sophomore students;The chongqing evening news reporter

　　试验目的

Test purpose

　　听邻桌笔画的声间，能否能辨别选择题答案。

Listen to the sound between the other strokes,Whether can identify multiple choice answers.

　　试验步骤

Test steps

　　为模拟考场情景，两名志愿者分别坐在记者的身后和身旁，室内尽量杜绝杂音。记者随机书写四个字母20次，每次间隔半分钟，以模拟审题时间。

To simulate the examination room,Two volunteers were sitting behind journalists and side respectively,Indoor as far as possible to eliminate noise.Reporter random writing four letters to 20 times,Every half a minute,To simulate the topic of time.

　　试验结果

The test results

　　要保证听声辨答案，至少得保证以下几个条件：室内基本无干扰；坐在答题者旁边或身后；答题者每答一道题的速度相对稳定；不能跳题；题目都是单选题。

To ensure the sound distinguishes the answer,Make sure at least the following conditions:Indoor basic no interference;Sitting next to an exam or behind;The speed of an exam answer every question is relatively stable;Not jump topic;Subject is a single topic selection.

　　实际上，考场情况千变万化，可能受到其他声响的干扰；考生跳过困难的题作答；答题速度时快时慢；答案并非单一的选择题。如果试题掺杂了其他题型，遭遇多选题等，都会让听声辨答案的正确率大大下降，甚至出现“一题错、题题错”的悲催结果。所以，这种方式是断不可用的。

In fact,The exam is protean,Could be affected by other interference noise;The examinee to skip over the difficult questions;The answer as fast as slow;The answer is not a single choice questions.If item with other items,A multiple choice, etc,To listen to the sound distinguishing the accuracy of the answer drops greatly,There are even"A question wrong/Topic title wrong"The disastrous results of.so,This way is not available.

CD好辨认 AB易混淆 CD is good to identify the AB is easy to confuse

　　10分钟后测试完毕，核对两人的试卷后发现，听声辨答案的准确率还颇高，坐在记者身旁的夏懿，20个字母对了12个，身后的何洋则对了11个，准确率分别达到60%和55%。其中，CD两个选项仅有1处错误，AB两个选项错误率较高，大部分不是将A错写为B，就是将B错写成A。

10 minutes after the test finished,Check the two people found after test,Listen to the sound distinguishing has high accuracy of the answers,Sitting beside reporter Xia Yi,20 letters of the 12,He Yang behind him at 11,Accuracy of 60% and 60% respectively.Among them,CD two options only 1 mistake,AB two options error rate is higher,Most will not A wrong written as B,Is the B written A wrong.

　　随后，两名志愿者互换位置，何洋的准确率上升为70%，夏懿则下降到55%，身边座位的准确率仍略高于身后。至于错误方面，仍是CD基本正确，AB容易混淆。[个人体验]

then,Two volunteers swap position,He Yang accuracy up to 70%,Xia Yi fell to 55%,Accuracy is still slightly higher than the seat behind him.As for the error,Still is a basic right of CDS,AB easily confused.[experience]

　　夏懿：CD书写速度较快，一个一画一个两画，非常好辨认。而很多人写A时，并非一板一眼地写成三画，通常只需两笔就可完成，书写时间跟B差不多，因此两者很容易混淆。至于身边座位准确率较身后稍高，是因为坐在身边眼睛余光有时可扫到对方，通过笔画走势判断字母。

Xia Yi:CD writing fast,A a draw to draw a two,Very good to identify the.And A lot of people write A,Is not written, matter-of-factly three pictures,Usually only two pen can be completed,Writing time is no more than B,And is easy to confuse the two.As for side seat behind a slightly higher accuracy,Because sitting around eyes and sometimes sweep the corner to the other party,Through the letters stroke direction judgment.

桌面光滑 准确率越低 Desktop is smooth, the lower the accuracy

　　听声辨答案既然跟听力有关，书写时的声音大小就是影响准确率的一个关键因素。

Listen to the sound distinguishing since the answer related to listening,Writing the size of the voice is the one of the key factors influencing the accuracy.

　　第一次试验是在木桌上进行，质地较为粗糙，笔画声较大。第二次试验换到更光滑的玻璃茶几上，两名志愿者位置不变。

Tests were conducted on the wooden table for the first time,Quality of a material is rough,Stroke voice is bigger.The second test to more smooth glass coffee table,Two volunteers position remains the same.

　　结果发现，随着笔画声的减小，志愿者的准确率有不同程度的下降，最高降幅达15%。不过仍然是身边的准确率高于身后，辨别CD的准确率高于AB。

The results found that,With the decrease of the stroke the sound,The accuracy in volunteers with varying degrees of decline,The highest drop of 15%.But is still behind the accuracy is higher than that of nearby,Distinguish between CD accuracy than AB.

[个人体验] [experience]

　　何洋：木桌由于纹理比较粗糙，笔画声非常清晰，易于辨认。换成玻璃茶几后，笔尖与纸面摩擦减小，声音时大时小，除非故意用力书写，否则有时根本就听不到。

He Yang:Wooden desk due to rough texture,Stroke sound very clear,Easy to identify.After change glass tea table,Pen and paper friction decreases,Sound it,Unless deliberately hard writing,Otherwise, sometimes can't hear at all.

不能跳题 多选题无力 Not jump topic multiple-choice questions

　　虽然换成玻璃茶几后准确率有所下降，但两位志愿者听声辨答案的成绩都还不错。但如果你真想用这个“踏雪无痕”的方式来作弊，那就大错特错了。

Although the accuracy decreased after change glass tea table,But two volunteers listen to sound distinguishes the good answer.But if you really want to use this"Through the snow non-trace"Way to cheat,It would be wrong.

　　第三次试验是随机在网上下载的一份初中政治试题，其中单选和多选题各10道。记者在答题时，故意跳过第5题、第10题不答。

The third test is random in a junior middle school politics try download on the Internet,Which radio and multiple choice 10 each way.Reporters on the answer,Intentionally skip. 5/Don't answer to question 10.

　　试验后核对发现，单选题中在跳题前，两位志愿者准确率很好，达到100%，但在跳过第5题后，答案则完全对不上；多选题情况更糟糕，准确率不到40%。

Check found after test,Single choice after jumping in before,Two volunteers accuracy is very good,100%,But after the jump. 5,The answer is right;Multiple choice situation even worse,Accuracy of less than 40%.

[个人体验] [experience]

　　何洋：跳题完全是坑爹，顺序完全混乱，一题错可能全盘皆输，绝对不能仅凭听力就能辨认准确答案。

He Yang:Jump is pit dad,Order complete chaos,One problem may be lost by mistake,Must not only by listening can identify the accurate answer.

　　夏懿：难题暂时搁下不答，是考试中很多学生争取时间的常用方法，一旦遇到这种情况，听声辨答案者“必死无疑”。同时，此方法面对多选题也颇为无力，如果答题者审题速度不快，情况还稍好，一旦速度过快，听声者根本分不清对方到底在答哪道题。（重庆晚报记者彭洋）

Xia Yi:Aside his problem didn't answer,The commonly used method is a lot of students in exams for time,Once met this kind of situation,Listen to the sound distinguishing the answer"die".At the same time,This method in the face of multiple choice is a weakness,If an exam topic speed fast,Situation is slightly better,Once the speed is too fast,Hearing those who can't distinguish what are the other answer what problem.(The chongqing evening news reporter Peng Yang)

　　转自重庆晚报

Since the chongqing evening news