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
54
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
EnergyfromNaturalGas1.Muchoftheworldgetsitsenergyfromfossilfuelsources,includingcoal,oil,andnaturalgas,
AmericanRacetotheMoonTherootsofAmerica’splantolandamanonthemooncanbefoundoutsideofthecountry.Althoug
Inthissectionofthetest,youwillbeaskedtochoosebetweentwoopinions.Youwillneedtoanswerthequestionbysupportin
HumanMigrationHumanmigration:thetermisvague.Whatpeopleusuallythinkofisthepermanentmovementofpeoplefromon
MountRushmoreMountRushmoreisamonumenttotheidealsoftheUnitedStates.Thefacesoffourpresidentswhocontributed
MountRushmoreMountRushmoreisamonumenttotheidealsoftheUnitedStates.Thefacesoffourpresidentswhocontributed
A、Sheexpectstheweathertobenicenextweekend.B、Sheforgotshehadsomuchstudyingtodo.C、Sheusuallyhandsinherassig
HudsonRiverSchoolTheHudsonRiverSchoolencompassestwogenerationsofpaintersinspiredbyThomasCole’sawesomelyRomantic
Youwillnowbeaskedtogiveyouropinionaboutafamiliartopic.Giveyourself15secondstoprepareyourresponse.Thenrecor
TheOriginsofPlantandAnimalDomesticationP1:Plantandanimaldomesticationisthemostmonumentaldevelopmenttohavetake
随机试题
制半夏目的在于
学校体育工作检查的内容不包括()
实行事故预警的出发点是()。
立式圆筒形焊接储液罐安装方法中,倒装法包括()。
本利比是衡量普通股股东当期股息收益率的指标。( )
按照现行政策,个人住房贷款的贷款额度最多不得超过所购住房市场价值的()。
改正在软件系统开发阶段已经发生的错误,属于()维护。(错误在系统测试阶段还没有发现)
2021年2月,习近平总书记在全国脱贫攻坚总结表彰大会上庄严宣告:“我国脱贫攻坚战取得了全面胜利”。下列关于脱贫攻坚的观点及举措,按提出的时间先后排序,正确的是()。①提出精准扶贫理念,创新扶贫工作机制②把精准脱贫攻坚目标作为三大攻
根据以下资料。回答下列题。2011年中国对哪个大洲的直接投资净额增长最多?()
Theworldisonthetopofastaggeringriseinthenumberofoldpeople,andtheywilllivelongerthaneverbefore.【C1】______t
最新回复
(
0
)