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
I saw a television advertisement recently for a new product called an air sanitizer. A woman stood in her kitchen, spraying the
I saw a television advertisement recently for a new product called an air sanitizer. A woman stood in her kitchen, spraying the
admin
2011-03-05
36
问题
I saw a television advertisement recently for a new product called an air sanitizer. A woman stood in her kitchen, spraying the empty space in front of her as though using Mace against an imaginary assailant. She appeared very determined. Where others are satisfied with antibacterial-laced sponges, dish soaps, hand sanitizers and telephone wipes, here was a woman who sought to sterilize the air itself.
As a casual student of microbiology, I find it hard to escape the absurdity here. This woman is, like any human being, home to hundreds of trillions of bacteria. Bacteria make up a solid third, by weight, of the contents of her intestines. If you were to sneak into her bathroom while she was showering--and based on my general impression of this woman from the advertisement, I don’t recommend this--and secret away a teaspoon of the water at her feet, you would find some 820 billion bacteria. Bacteria are unavoidably, inevitably--and, usually, utterly benignly--a part of our world.
The fantasy of a germ-free home is not only absurd, but it is also largely pointless. Unless you share your home with someone very old, very young (under 6 months) or very ill, the few hundred bacteria on a countertop, doorknob or spoon pose no threat. The bacteria that cause food poisoning, the only significant rational bacterial worry in the average home, need to multiply into the thousands or millions before they can overwhelm your immune system and cause symptoms.
The only way common food poisoning bacteria can manage this is to spend four or five hours reproducing at room temperature in something moist that you then eat. If you are worried about food poisoning, the best defense is the refrigerator. If you don’t make a habit of eating perishable food that has been left out too long, don’t worry about bacteria.
Viruses are slightly different. You need only pick up a few virus particles to infect yourself with a cold or flu, and virus particles can survive on surfaces for days. So disinfecting the surfaces in the home should, in theory, reduce the chances of picking up a bug.
In practice, the issue is less clear. A study by Dr. Elaine Larson at the Columbia School of Nursing called into question the usefulness of antibacterial products for the home. In New York, 224 households, each with at least one preschooler, were randomly assigned to two groups. One group used antibacterial cleaning, laundry and hand-washing products. The other used ordinary products. For 48 weeks, the groups were monitored for seven symptoms of colds, flu and food poisoning-and found to he essentially the same. According to Dr. Gerba’s research, an active adult touches an average of 300 surfaces every 30 minutes. You cannot win at this. You will become obsessive-compulsive. Just wash your hands with soap and water a few times a day, and leave it at that.
We can infer from Paragraph 3 that ______.
选项
A、healthy people should live separately from unhealthy members of the family
B、a germ-free home is not only possible, but significant
C、unless you live with the vulnerable, it is pointless to sterilize the air
D、our immune systems are too weak to fight against the food poisoning bacteria
答案
C
解析
从"Unless you share your home with someone very old, very young (under 6 months) or very ill, the few hundred bacteria on a countertop, doorknob or spoon pose no threat."可看出,如果不是和老年人、婴儿住在一起,细菌不会造成危害,故选项C最符合题意。
转载请注明原文地址:https://kaotiyun.com/show/6byK777K
本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
0
A类竞赛(研究生)
大学生英语竞赛(NECCS)
相关试题推荐
WhatcanblindstudentsinKenyabenefitfromthetechnologytobeadopted?
Allcountrieshavelawssayingwhichdrugspeoplecanandcannotuse.Inatypicalcountry,mostmedicinesareavailableonlywi
(81)Thetwentiethcentury,perhapsmorethananyother,markedaperiodwherearchitectsexperimentedwithformandtooktheiri
IhavebeenreadingalotonmyiPadrecently,andIhavesome【46】______(complain)—notabouttheiPaditselfbutaboutthesta
Identifythefollowingshapesandmarktheoddoneout.
ForgetLondon,ParisandMilan.ThelatestplaceforfashionableEuropeanstospendaweekendshoppingisMarrakech.Withcheapai
Whatdosomescientistsusedroneaircrafttor?
巴拉克-奥巴马总统上个月在对美国进步中心的一场演讲中提到,经济不公是“我们这个时代的决定性挑战”。【T1】他提出,不公平是危险的,不仅仅是因为不美观,更是因为不公平本身破坏了社会阶层的提升。(upwardmobility)如此一来,贫困者便难以摆脱贫困,
SincemybirthIhavehadabirthdaycakewithcandles,oneforeachyearofmybirthdays.Todate,Ihavehad325candles.How
随机试题
下列关于通气/血流比值的描述,哪一项是错误的?
(2014年第58题)测量血压方法的注意事项,下列说法正确的是
紫绀的原因是
A/当样品量为3时,取样量应为B/注射用无菌粉末装量差异检查需取供试品的瓶(支)数C/重量差异检查需取供试品的片数D/溶出度测定需取供试品的片数E/含量均匀度测定的初试需取供试品的片数10
牙尖交错牙合时,上颌牙盖过下颌牙唇(颊)面的垂直距离的是牙尖交错牙合时,与切道斜度成正比的是
工程网络计划有不同的表达形式,下列表述正确的是( )。
下列属于车辆购置税税收缴纳方法的有()。
关于营业税纳税地点的下列表述中,正确的有()。
学生害怕在社交场合讲话,担心自己会因发抖、脸红、声音发颤、口吃而暴露自己的焦虑,觉得自己说话不自然,因而不敢抬头,不敢正视对方眼睛。这种心理症状是一种()。
—Wouldyouliketocometotheballetwithmetonight?—Ohyes,thankyou.Iwouldbe______togowithyou.
最新回复
(
0
)