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
Natural flavorings and fragrances are often costly and limited in supply. For example, the essential ingredient in a rose fragra
Natural flavorings and fragrances are often costly and limited in supply. For example, the essential ingredient in a rose fragra
admin
2022-08-16
74
问题
Natural flavorings and fragrances are often costly and limited in supply. For example, the essential ingredient in a rose fragrance is extracted from natural rose oil at a cost of thousands of dollars a pound; an identical synthetic substance can be made for 1% of this cost. Since the early twentieth century, success in reproducing these substances has created a new industry that today produces hundreds of artificial flavors and fragrances.
Some natural fragrances are easily synthesized; these include vanillin, the aromatic ingredient in vanilla, and benzaldehyde, the aromatic ingredient in wild cherries. Other fragrances, however, have dozens, even hundreds of components. Only recently has it been possible to separate and identify these ingredients, by the use of gas chromatography and spectroscopy. Once the chemical identity is known, it is often possible to synthesize them. Nevertheless, some complex substances, such as the aroma of fresh coffee, have still not been
duplicated
satisfactorily.
Many of the chemical compounds making up these synthetics are identical to those found in nature, and are as harmless or harmful as the natural substances. New products must be tested for safety, and when used in food, must be approved by the U.S. Food and Drug Administration.
The
availability
of synthetic flavors and fragrances has made possible a large variety of products, from inexpensive beverages to perfumed soap to used cars with applied "new car odor".
The delegates coming this far, they
did not want to return without accomplishing something.
选项
A、The delegates came this far, they
B、Coming this far, the delegates felt they
C、Having come this far, the delegates
D、To come this far, the delegates
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/SWuO777K
本试题收录于:
CATTI三级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI三级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
AnautisticchildusuallyAappearancetogothroughhisBearlydevelopmentCnormally,butabreakusuallyDoccursbytheageof
1Dementia,ageneraldecreaseinintellectualabilities,involvesimpairmentofmemory,judgment,andsocialfunctioning.Thet
Whydoesthestudentgotoseehisprofessor?
Whydoesthestudentgotoseethedirector?Choose2answers.Whydoesthedirectormentionthestudent’sfriends?
ARTANDCULTUREOFPACIFICNORTHWESTCOMMUNITIES(1)The1,600-kilometerstretchofthenorthwesternPacificcoastofNorth
TheEnvironmentinPerspective:IsEverythingGettingSteadilyWorse?Muchofthediscussionofenvironmentalpr
Asagroup,theelderlyarethemostalienatedmembersofoursociety:notyetreadyfortheworldofthedead,notdeemedfitf
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticlessuspendedinthewater.Bluelight,beingofshort
AfamilydoctorchargedtheNightHomeService(NHS)morethan£500,000insevenyearsfornightvisitsthathispatientsdidn
Thegirlmadealightofherdisappointmentatbeingtoosicktogotothedance.
随机试题
A、剧烈头痛,呕吐B、膀胱刺激症状C、寒战、高热D、食欲锐减、恶心、呕吐E、心率增快,夜间不能平卧慢性肾炎并发尿毒症的早期表现()
Ⅲ期肿瘤药物临床试验病例选择要求
在工程质量保修期限内,因多方面原因造成的质量问题,要由()单位负责维修更换,由责任单位负责赔偿损失。
甲公司于20××年1月1日向银行借入一笔生产经营用短期借款,共计600000元,期限为9个月,年利率为5%。根据与银行签署的借款协议,该项借款的本金到期后一次归还;利息分月预提,按季支付。要求:编制甲公司1月末计提利息的会计分录;
八年级上册教材后设置了“课外古诗词背诵”部分,其中包括《长歌行》《野望》《早寒江上有怀》等共10首诗歌。从语文教材的构成要素来看,这属于语文教科书的()。
给定材料1.随着大众创业、万众创新时代的到来,中央配套了涉及大学毕业生、退伍军人、民间金融资本平台、惠农政策改革、创客空间、资本众筹、开放公共产品建设领域的一系列激励性强、创新意味浓厚、操作简便、惠利性好的政策措施,这些政策呼应大众创业、万众创新
甲公司于4月24日通知乙公司急需货物10吨,乙公司遂于4月25日按双方之间的交易惯例发货。4月26日甲公司义通知乙公司不需要该批货物。对此,下列说法正确的是()。(2017一专一32)
设f(x)连续,且f′(0)>0,则存在δ>0,使得().
Telecom:TheMergerIstheMessageLastyearendedwithabangintelecom.Duringthefinalthreemonths,Cingularclosedits
Directions:Forthispart,youareallowedthirtyminutestowriteashortessayentitledWhatIsthepurposeofpunishment.You
最新回复
(
0
)