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 vital ingredient in a rose fragrance
Natural flavorings and fragrances are often costly and limited in supply. For example, the vital ingredient in a rose fragrance
admin
2015-10-13
43
问题
Natural flavorings and fragrances are often costly and limited in supply. For example, the vital 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. "
From the passage we can learn that______.
选项
A、natural flavorings and fragrances are not quite dear
B、the limitation of natural flavorings and fragrances is clear
C、the supply of natural flavorings and fragrances is adequate to meet the demand
D、the cost of producing natural flavorings and fragrances is high
答案
D
解析
细节题型。见第一段第一句:Natural flavorings and fragrances are often costly andlimited in supply.因此选项D为答案。
转载请注明原文地址:https://kaotiyun.com/show/7xwO777K
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
AmericanRacetotheMoonTherootsofAmerica’splantolandamanonthemooncanbefoundoutsideofthecountry.Althoug
A、Hedidn’tknowthebookwasabest-sellerB、He’sbecomingmoreinterestedinthebookC、He’sonhiswaytothebookstoreD、He
"MeetingPeople"Nowlistentoashortconversationbetweenastudentandhisfriend.QuestionDescribetheman’sp
MountRushmoreMountRushmoreisamonumenttotheidealsoftheUnitedStates.Thefacesoffourpresidentswhocontributed
Observationsofcetaceansinthewildhaveprovidedsomeinsightsontheirlearningabilities.Severalbottlenosedolphinsoffw
Somepeoplechoosefriendswhoaredifferentfromthemselves.Otherschoosefriendswhoaresimilartothemselves.Comparethea
"TheEvolutionofBirds"TheOriginofBirdsAnalysisofbirdsandofreptilianfossilsindicatethatbirdsbelongtothe
"LearningaForeignLanguage"QuestionManypeoplehavelearnedaforeignlanguageintheirowncountry;othershavelearn
Accordingtotheprofessor,whydoesSartrerejectmostWesternapproachestoethics?
ReconstructingAncientEnvironmentsP1:Archaeologyisparticularlyimportantforlearningaboutprehistoricsocieties,forwhom
随机试题
依照我国民法原理,土地使用权从其法律性质上讲,属于()。A.自物权B.他物权C.完全物权D.地役权
肺气肿患者肺部叩诊为【】
何谓成分输血?
制定《药品管理法》最根本的目的不包括
新生儿窒息复苏时最根本的是
不宜制成缓释制剂的为
关于施工现场消防管理的说法.正确的有()。
某账户本期增加发生额为1200元,减少发生额为1500元,期末余额为1300元,则该账户本期期初余额为()元。
关于民法调整的人身关系,下列说法不正确的是()
YouNeedCourageShortlyafterIbeganacareerinbusiness,IlearnedthatCarlWeatherup,presidentofPepsiCo(百事可乐公司),w
最新回复
(
0
)