首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Codes are scanned by ______.
Codes are scanned by ______.
admin
2010-03-19
20
问题
Codes are scanned by ______.
What are zebra stripes on the tomato soup cans and potato chip bags? They are special black and white vertical lines. These black and white stripes can be read by an optical scanner, or computer. The "scanner", which reads the lines of code, is a small laser beam of light. When the light ray is broken by the black stripes, the computer reads the information about the product.
The code is called the Universal Product Code (UPC). It is designed to add speed and efficiency to stores by using computers. It can do this in several ways. First, it is not necessary for workers to put individual prices on items. Errors in prices are eliminated, or done away with. Also, the time spent checking out is reduced. UPC gives an itemized receipt to the customer with all the items, prices, and totals. The store clerk does not need to spend time checking the price on the item and punching it into cash register. This UPC computerized system will probably save as much as 45 percent of the checkout clerk’s time.
What do the stripes mean? How does the computer interpret the stripes? The number printed below the vertical bars identifies the manufacturer and the manufacturer’s item. As many as 10 trillion individual machinereadable numbers can be used with this system.
选项
A、the checkout clerk
B、the customers themselves.
C、a laser beam of light.
D、the cash register.
答案
C
解析
转载请注明原文地址:https://jikaoti.com/ti/hPHMFFFM
0
专业英语四级
相关试题推荐
Humanbeingshaveusedtoolsforaverylongtime.Insomepartsoftheworldyoucanstillfindtoolsthatpeopleusedmoretha
Whichofthefollowingstatementsistrue?
Whatwillfuturehistoriansrememberabouttheimpactofscience【C1】______thelastdecadeofthe20thcentury?Theywilln
Whatdothespeakersmainlydiscuss?
Onwhataspectofweatherforecastingdoestheconversationfocus?
WriteonANSWERSHEETTWOanoteofabout50-60wordsbasedonthefollowingsituation:Theheatingsysteminthehotelwhe
GETTINGAGRANT Whocangetthismoney?Anyonewhogetsaplaceonafirstdegreecourse,althoughastudentwhohas
SomepeoplewouldsaythattheEnglishman’shomeisnolongerhiscastle;thatithasbecomehisworkshop.Thisispartlybecaus
Katherinestudiesharderthan______inourclass.
随机试题
在证据可能灭失或者以后难以取得的情况下,经行政机关负责人批准,可以先行登记保存,并在15日内及时作出处理决定。()
A.乌头煮制B.地黄蒸制C.白芥子炒制D.大黄酒炙E.柴胡醋炙经炮制能降低毒性的是
要一个人独自进食,即使不算重罚,在中国文化中通常也被视为不幸,一种不无悲凉的境地。汉语对吃独食的描述,大都乏善可陈,一句“胡乱吃了些”搪塞过去。中国人的社会中,人必须借饮食与他人沟通,与社会上的人形成生命共同体之感受。如今,大家庭在解体,晚婚单身
对设计投标人的资格审查包括( )。
阅读以下文字,完成下面问题大洋钻探:揭示地球环境的历史档案为了解自己生存环境的变化,人类对地球的视野不但要在空间上拓宽,也需要在时间上扩展。地球的环境演变,在不同场合留下了各种各样的“历史档案”,惟独在深海
把下面的六个图形分为两类,使每一类图形都有各自的共同特征或规律,分类正确的一项是:
Edie:IthinkProfessorHoltissmartandshe’sreallyagoodteacher.Rosa:OK.I’lltrytogetintoherclass.Edie:_____
AnyonecantrackaVenmouser’spurchasehistoryandcollectadetailedprofile—includingtheirdrugdeals,eatinghabitsand
Thereisnolink,whatsoever,betweentheproducersandusersofmanpowerwiththeresultthatinstitutionsoflearning,essent
Onedayawolfmeetsafox.Thefoxsays,"Letus(11)ofawaytocatchtherabbit."Afterawhile,thewolf(12),"Ihav
最新回复
(
0
)