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
We’ve become a rather germ-phobic (恐惧症的)society, what with our antibacterial soaps, hand sanitizers, automatic water faucets (水龙
We’ve become a rather germ-phobic (恐惧症的)society, what with our antibacterial soaps, hand sanitizers, automatic water faucets (水龙
admin
2013-07-20
44
问题
We’ve become a rather germ-phobic (恐惧症的)society, what with our antibacterial soaps, hand sanitizers, automatic water faucets (水龙头)and self-flushing toilets—all of which are supposed to reduce our contact with potential disease-causing bugs. But it turns out that at least one pathogen-fighting (抵抗病原体的)strategy may actually be exposing us to more germs, rather than fewer.
Researchers at Johns Hopkins Hospital conducted an eye-opening study on the bacterial growth within two different kinds of taps-hands-free, automatic faucets activated by an electronic eye, and the old-fashioned manual type that users have to turn in order to start the flow of water. About 50% of the water samples from the electronic faucets tested positive for some bacteria, while only 15% of the samples from the manual faucets did. Yes, the automatic faucets harbored more bugs than the manual ones, but that doesn’t mean they’d make you sick. The water samples were taken from faucets located all over the hospital, including patient rooms, and no patients reported infections from the water.
Still, in a hospital setting, the findings could be cause for alarm. That’s because hospitalized patients are more likely to have compromised immune systems, whether they are being treated for cancer or undergoing an organ transplant. That’s why Hopkins officials decided to play it safe and go back to manual faucets in a new building under construction on campus that would include patient rooms. "The electronic faucets are in the process of being removed and the plan is to remove them from the existing hospital as well," says Sydnor, a fellow in infectious diseases at Hopkins.
Why are the automatic faucets so bug-friendly? Gregory Bova, senior engineer at the hospital, says it’s the plumbing. While the plumbing for manual faucets is relatively straightforward, with a pipe each for hot and cold water feeding into the faucet, hands-free models are more complex. They include various valves (阀门), screens and filters designed to prevent backflow of hot or cold water to the wrong pipe, and all that machinery provides the perfect nesting ground for bacteria and other pathogens.
Sydnor and Bova both acknowledge that the results surprised them. They never expected that the hands-free faucets would contain more bacteria than the manual ones. In fact, their study started out as a way to determine how often they should program the automatic faucets to run in order to flush out colonies in case they weren’t used often enough. It turns out the faucets were never that idle, but that they were a fertile location for bacteria to take hold. Still, the amount of bacterial growth the researchers found wasn’t enough for them to avoid electronic faucets in public restrooms: in the public, non-patient care areas of the hospital, Sydnor and Bova say they’re keeping the automatic model.
What was Sydnor and Bova’s study originally designed for?
选项
A、Doing a count of colonies in automatic faucets.
B、Ensuring automatic faucets work properly and frequently.
C、Demonstrating the convenience of using automatic faucets.
D、Reminding people to beware of germs in faucets.
答案
B
解析
事实细节题。由定位句可知,他们的研究开始时是为了确定在自动水龙头不被人经常使用的情况下,应该每隔多久对它们进行程序设定,好让水冲走里面的菌丛。由此可见,该研究最初的目的是确保自动水龙头正确而频繁地工作,因此答案为B)。
转载请注明原文地址:https://jikaoti.com/ti/HpbFFFFM
0
大学英语六级
相关试题推荐
A、Sculptureisnotatypicalformofmodernart.B、Modernartcannotexpresspeople’struefeelings.C、Therecentsculptureexhi
Noiseconstitutesarealandpresentdangertopeople’shealth.Dayandnight,athome,atwork,andatplay,noisecanproduce
The2000decennialcensusaimsatobtainingtheexactnumberofpopulationaswellasabetterpictureoftheextentofintermar
The2000decennialcensusaimsatobtainingtheexactnumberofpopulationaswellasabetterpictureoftheextentofintermar
Forthispart,youareallowed30minutestowriteashortessayonthetopicofShouldEnterprisesHoldanAnnualMeeting?.You
A、Itwasmisleading.B、Itwasratherboring.C、Itwasenjoyable.D、Itwasjustso-so.C女士说她以前从未听过如此有趣的演讲,男士说Yes,wasn’t“marvelous
A、Stopinthemiddleoftheclass.B、Speedupthepace.C、Marchinplaceforawhile.D、Concentrateonexercise.C短文谈到,如果你在有氧课里太
A、Theyhavetofinishitquickly.B、Theyhavetousewhattheyhave.C、Theyhavetoworkhardanddotheirbest.D、Theymustred
Spendingtimeinabookshopcanbemostenjoyable,whetheryouareabook-loverormerelygotheretobuyabookasapresent.Y
A、Shefeelsveryhotintheroom.B、Shewantstoavoidmeetingpeople.C、Shewantstosmokeacigaretteoutside.D、Shedoesn’tl
随机试题
人们进入百货公司,各自注意的东西总不一样,这是知觉()的表现。
胸膜粘连最常见的部位是
A.多见于50岁以前的中年妇女,外阴瘙痒为主要症状B.可发生于任何年龄妇女,以40岁左右发病率最高,晚期病例有阴道口挛缩狭窄C.青春期发病者居多,外阴色素减退,但皮肤光滑润泽、弹性正常D.常见于绝经后的老年妇女,阴道分泌物增多及外阴瘙痒是主要症状E
婴儿期用药应考虑的是
在一定条件下,已建立平衡的某可逆反应,当改变反应条件使化学平衡向正反应方向移动时,下列有关叙述正确的是()。
在浇筑竖向结构混凝土前,应先在底部填与混凝土内砂浆成分相同的水泥砂浆,其厚度应为()。
托管人可以委托符合条件的境外资产托管人负责境外资产托管业务。这些条件有()等。I.在中国大陆以外的国家或地区设立,受当地政府、金融或证券监管机构的监管Ⅱ.最近一个会计年度实收资本不少于100亿美元或等值货币,或托管资产规模不少于1000亿美元或
由兴趣、理想和荣誉感而推动学生努力学习的动机是()。
【2015河北张家口】皮格马利翁效应体现了教师的()对学生的影响。
“不懂几何不得入门,能谈哲学方可出门”,这句话是对()的学园的描述
最新回复
(
0
)