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
Toothpaste is a substance【C1】______for the cleaning and polishing the surface of the teeth. Its primary function is【C2】______too
Toothpaste is a substance【C1】______for the cleaning and polishing the surface of the teeth. Its primary function is【C2】______too
admin
2011-01-21
28
问题
Toothpaste is a substance【C1】______for the cleaning and polishing the surface of the teeth. Its primary function is【C2】______tooth decay. It is only as a by-product of cleaning teeth【C3】______toothpaste bas become a cosmetic.
Toothpaste【C4】______belongs to a group of dental hygiene products【C5】______as dentifrices. These【C6】______toothpaste, tooth powder, and various bacteria removing mouthwashes.
Historically, toothpaste is as【C7】______as the first toothache and human beings’first perception that teeth were【C8】______of their attractiveness to the opposite sex. Long【C9】______the invention of the toothbrush, ancient Greeks and Romans scrubbed their teeth with bits of cloth coated with the burnt heads of mice, moles and rabbits in the【C10】______that contact with these strong toothed animals【C11】______make human teeth firm. If these materials【C12】______revolting and dangerous, it is worth thinking【C13】______some other substances that have been used in toothpaste in the past 20 years. After the【C14】______of the toothbrush, it was common to【C15】______toothpaste containing chloroform(a flavoring【C16】______can cause cancer), and lead, which actually poisoned the toothpaste.
It was not【C17】______the late nineteenth century that teeth cleaning was【C18】______as a vital part of dental health. In 1896, Leon Williams argued that tooth decay was the【C19】______of acid and bacteria, and created the【C20】______"A clean tooth never decays". Although not strictly correct, he did create an environment ill: which dental prevention became the norm.
【C15】
选项
A、find
B、search
C、create
D、invent
答案
A
解析
find“发现”,符合题意。
转载请注明原文地址:https://jikaoti.com/ti/EODsFFFM
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
IraCarlin,worldwidemediadirectoroftheworlds【21】advertisingagency,McCannEricksonisquitecandidaboutusingfeartose
Electricityplaysanessentialpartinourlife.Noonecandenythatelectriclightisnecessaryforpeople’slife.However,ca
Aweathermapisanimportanttoolforgeographers.Asuccessionofthreeorfourmapspresentsacontinuouspictureofweather
Onebasicweaknessinaconservationsystembasedwhollyoneconomicmotivesisthatmostmembersofthelandcommunityhaveno
Onebasicweaknessinaconservationsystembasedwhollyoneconomicmotivesisthatmostmembersofthelandcommunityhaveno
WhichofthefollowingiscoveredinBCDInternationalprograms?______
Studythefollowingtwopicturescarefullyandwriteanessayonthem.Inyouressay,youshould(1)describethepicturesbri
Walking—likeswimming,bicyclingandrunning—isanaerobicexercise,【B1】______buildsthecapacityforenergyoutputandphysica
CoincidingwiththegroundbreakingtheoryofbiologicalevolutionproposedbyBritishnaturalistCharlesDarwininthe1860s,Br
Whatisthewomanlookingfor?
随机试题
鉴别二氢黄酮的专属反应是
A.百合固金汤加减B.清金化痰汤加减C.桑杏汤加减D.杏苏散加减E.桑菊饮加减咳嗽痰热壅肺证宜用方药()。
A.药事管理与药物治疗学委员会全体委员同意B.药事管理与药物治疗学委员会三分之一以上委员同意C.药事管理与药物治疗学委员会二分之一以上委员同意D.抗菌药物管理工作组三分之二以上成员同意E.抗菌药物管理工作组二分之一以上成员同意根据《抗菌药物临床应
房地产经纪人执业资格注册的有效期为()年。
图5—2—3所示冲床的冲压力F=300πkN,钢板的厚度t=10mm,钢板的剪切强度极限τb=300MPa。冲床在钢板上可冲圆孔的最大直径d是()。[2012年真题]
根据企业破产法律制度的规定,下列关于债权人向人民法院申报债权的法定期限中,说法错误的是()。
地球的卫星,木星的卫星,以及土星的卫星,全都是星系系统的例证,其中卫星在一个比它大得多的星体引力场中运行。由此可见,在每一个这样的系统中,卫星都以一种椭圆形的轨道运行。以上陈述可以逻辑地推出下面哪一项陈述?
人与自然是生命共同体。绿色是生命的象征、大自然的底色。绿色发展,就其要义来讲,是要解决好人与自然和谐共生问题。要从根本上解决生态环境问题,必须贯彻绿色发展理念,坚决摒弃损害甚至破坏生态环境的增长模式,把经济活动、人的行为限制在自然资源和生态环境能够承受的限
A、体育世界B、动物世界C、新闻半小时B
CarsintheFutureAsbigcarscausemanyproblems,/suchaspollution,shortageofparkingspace,crowdedtraffic,/scien
最新回复
(
0
)