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
2016-08-29
105
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. 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.
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 a-gainst the wall of the ear canal. Then turn the head to the side to let the water out.
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/UiG7777K
0
大学英语六级
相关试题推荐
A、Parents’supportandloanforthestudents.B、Thedecliningopportunitiesforthequalifiedpeople.C、Thegrowingneedforhig
A、Theyhiredsomeonetostayintheirhome.B、Theylefttheirpetswiththeirrelatives.C、Theyrentedtheirhousetoastudent.
Overacenturyafteritended,theCivilWarremainsthefundamental【B1】_____inAmericanhistory.Itproducedalossoflife【B2】
Whywouldananimalkillitself?Itseemsastrangequestion,andyetitisonethathas【B1】______somepeopleforalongtime.T
InearlyAprilaseriesofreportsappearedonlineintheUnitedStatesandtheUnitedKingdomlamenting(痛惜)the"lazyFrench".
A、Itmakesherpopularamongstudents.B、Itavoidsthedullnessofstudy.C、Itsavesherlotsofmoney.D、Itmakesthenoteseas
A、Shedoesn’tagreewiththeman.B、Shewantstheman’sopinion.C、Themanisoverqualified.D、Themanshouldn’treactsostrong
GeorgeWilliams,oneofScottsdale’slastremainingcowboys,hasbeenraisinghorsesandcattleonhis120acresfor20years.T
A、Themansawahorrormovie.B、Themanlikesmoviesverymuch.C、Thewomandoesn’tliketheater.D、Thewomanhadfrighteningdr
随机试题
VANCIL(凡客诚品),由原卓越网创始人陈年先生创立,VANCL运营所属之凡客诚品(北京)科技有限公司,主体运作者均系原卓越网骨干班底。由欧美著名设计师领衔企划,集结顶级男装品牌经典款式之精华,同时参考亚洲男士体型特点,精选高质面料贴身制作,让用户以中等
下列哪项不是疳证的主要临床表现
如下图所示,该土地开发项目在一个大城市的中心,总的土地开发面积约为50万m2,该项目的项目管理组织结构图有如下特点,包括()。
下面是关于Windows98文件名的叙述,错误的是()。
()是商业银行的最高风险管理/决策机构,承担商业银行风险管理的最终责任。
关于商业银行个人理财业务,下列表述中错误的是(。)。
企业结转已销商品销售成本时,对于结转该商品已计提的存货跌价准备,应贷记的科目是()。
Thesituationalapproachisagrammar-basedlanguageteachingmethodwhichfocuseson______.
阅读下面材料,回答问题。李老师在教学中存在这样一种令人尴尬的现象:他讲课不可谓不透、不明、不用功(有时甚至很卖力),课下督促检查不可谓不细、不紧、不认真,而学生也付出了较大的努力,师生满以为会取得较大的收获与提高,可最终结果却不尽如人意,付出和希
A、 B、 C、 D、 D题干中的五幅图虽然都是由两个图形重叠交错构成,但彼此间却不覆盖,因此D选项符合此规律。
最新回复
(
0
)