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
A、It improves hearing. B、It causes infections. C、It keeps our ears dry. D、It protects our ears. D录音提到耳垢有很多用途,包括保护和清洁耳朵,阻挡灰尘、昆虫等物
A、It improves hearing. B、It causes infections. C、It keeps our ears dry. D、It protects our ears. D录音提到耳垢有很多用途,包括保护和清洁耳朵,阻挡灰尘、昆虫等物
admin
2017-06-29
42
问题
Some people’s ears produce wax like busy little bees. This can be a problem even though ear wax appears to serve an important purpose. [19]It protects and cleans the ear. It traps dirt and other matter, and it keeps insects out. Doctors think earwax might also help protect against infections. And the waxy oil keeps ears from getting too dry. So earwax is good. It even has a medical name: cerumen. And there are two kinds. Most people of European or African ancestry have the "wet" kind: thick and sticky. East Asians commonly have "dry" earwax.
But you can have too much of a good thing.
The glands in the ear canal that produce the wax make too much in some people. Earwax is normally expelled; it falls out of the ear or gets washed away. But extra wax can harden and form a blockage that interferes with sound waves and reduces hearing.
People can also cause a blockage when they try to clean out their ears, but only push the wax deeper inside. Earwax removal is sometimes necessary. But you have to use a safe method or you could do a lot of damage.
[20]Experts at the National Institutes of Health, NIH, suggest some ways to treat excessive earwax yourself. The wax can be softened with mineral oil, glycerin or ear drops. Hydrogen peroxide or carbamide peroxide may also help.
Another way to remove wax is known as irrigation. With the head upright, take hold of the outer part of the ear. Gently pull upward to straighten the ear canal. Use a syringe device to gently direct water against the wall of the ear canal. Then turn the head to the side to let the water out.
[21]The experts at NIH say you may have to repeat this process a few times. Use water that is body temperature. If the water is cooler or warmer, it could make you feel dizzy. Never try irrigation if the eardrum is broken. It could lead to infection and other problems.
After the earwax is gone, gently dry the ear. But if irrigation fails, the best thing to do is to go to a health care provider for professional assistance.
You should never put a cotton swab or other object into the ear canal. But you can use a swab or cloth to clean the outer part of the ear. Experts agree with the old saying that you should never put anything smaller than your elbow in your ear.
19. What is the function of earwax?
20. What can be used to remove earwax according to experts in NIH?
21. What do we learn about irrigation?
选项
A、It improves hearing.
B、It causes infections.
C、It keeps our ears dry.
D、It protects our ears.
答案
D
解析
录音提到耳垢有很多用途,包括保护和清洁耳朵,阻挡灰尘、昆虫等物质,防止耳朵感染,避免耳朵过于干燥等。因此选D项“保护耳朵”。
转载请注明原文地址:https://kaotiyun.com/show/VjU7777K
0
大学英语六级
相关试题推荐
Bloggingisapastimeformany,evenalivelihoodforafew.Forsome,itbecomesanobsession(着迷,使人痴迷的事物).Suchbloggersoften
Ahappymarriageapparentlyisgoodmedicine,buthostilespousesmay【B1】______oneanother’shealthCouplesinconflict-ridden
A、Sympathetic.B、Skeptical.C、Grateful.D、Indifferent.A选项为表态度的形容词。听到男士所说的sympathize应该知道A是其同根词。
Onecalledherbossa"bitchfromhell"whileanotheradmitted"lyingthroughhisteeth"atinterview.BoththeBritishjobappl
北京是中国的首都,是全国的政治、经济、文化中心。它是一座历史文化名城,其历史可追溯到3000年前。作为中国四大古都(FourGreatAncientCapitals)之一,北京有着800多年的建都历史,因而北京城内有很多传统而宏伟的宫廷建筑(impe
Webuybooks,andthentheywaitforustoreadthemDays,months,evenyears.Booksare【C1】______That’sOKforbooks,butnotf
A、GeorgeWashington.B、Ablackslave.C、Aslaveowner.D、AQuaker.D原文提到,人们认为theUndergroundRailroad是由一个名字叫IsaacHopper——基督教贵格会
A、Theyareveryfrighteningandpowerful.B、Theyareinterestedintornadoes.C、Theyallworkveryhard.D、Theydon’tknowwhyt
A、Hemadecarelessmistakes.B、Hissuperiordidn’ttakehimseriously.C、Hisopinionswereignoredbyothers.D、Hewasdeceived
随机试题
第一个制造原子弹的国家是()。
对制造商而言,灰色市场活动的弊端主要有()
设计和维持一种有助于提高集体活动效果的组织结构的活动过程是()
某大型商场的消防应急照明和疏散指示系统由1台消防应急照明控制器、1台应急照明集中电源、2台应急照明分配电装置和80只消防应急灯具组成,则该系统属于()。
汇兑分为()
简述班杜拉社会学习理论的主要内容。
从哲学上看,“一鼓作气,再而衰,三而竭”说的是()。
在社会与生活步伐加快的今天,人们难得闲暇去仔细翻阅报刊来_______当下集体意识的火花、把握社会想象的脉搏。互联网上的搜索引擎为难以_______的人们提供了方便,它已成为人们获取信息的重要手段。网民只需手指一点,即可了解社会当天所发生的和最受关注的热点
某单位有18名男员工和14名女员工,分为3个科室,每个科室至少有5名男员工和2名女员工,且女员工的人数都不多于男员工,问一个科室最多可以有多少名员工?
Whichofthefollowingdoesthepassagemainlydiscuss?Accordingtothepassage,theCarboniferousperiodwascharacterizedb
最新回复
(
0
)