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
22
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".
A seamless transition enabled the team to efficiently and empathetically handle
increasingly
call volumes from guests whose travel plans
affected
by the unexpected storm.
选项
A、increasing; were affected
B、increased; had been affected
C、increasing; have been affected
D、increased; are affected
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/MWuO777K
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
Whileitisdifficultforsomepeopletochangeunhealthyhabits,thereare______forexercisingfrequentlyandeatingfewerfatt
MoonquakesareAsimilarthesmallertremorsBthatarefeltCduringearthquakesDonEarth.
Addingabicyclelanealongthefreewayhasresultedin______bicycletrafficonthetwomainroutesthroughtown.
ThenumberofAwomenwhoBenternontraditionalfieldsChavebeenDincreasingsteadilysincethe1970s.
Itisnowwell-establishedthatpetroleummigratesthroughaquifersandcanbecometrappedinreservoirs.Petroleummigrationis
Theidealcollegewouldbeakindofeducationalretreatinwhichyoucouldtrytofindyourself;findoutwhatyoulikeandwan
Asagroup,theelderlyarethemostalienatedmembersofoursociety:notyetreadyfortheworldofthedead,notdeemedfitf
Losingajobornotbeingabletofindonealmostalwaysbringsunwelcomechanges.Ifyou’velostajob,thefirstfeelingisof
Althoughthesocialsciencesdifferentagreatdealfromoneanother,theyshareacommoninterestinhumanrelationship.
Dreamshavealwaysheldauniversalfascination.Someprimitivesocietiesbelievethatthesoulleavesthebodyandvisitsthes
随机试题
轴向间隙直接影响丝杠螺母副的运动精度。()
《五代史伶官传序》所运用的主要论证方法是()
患儿4岁,其母提拉其手上台阶时,出现患儿哭闹,右肘痛,不愿活动。查体:右肘稍肿胀,未见明显畸形,X线片未见明显异常征象。正确的治疗方法是
中国最早的《不动产登记条例》是在()年颁布的。
我国可设立防汛指挥机构的流域有()。
下列属于国家禁止进口的是()。
甲公司是一家钢铁生产企业。近年国内铁矿石价格持续走高,公司成本压力较大。为摆脱此种局面,甲公司可以选择的发展战略类型是()。
历史文化街区、村镇由()核定公布。
在中央银行的职能中,“银行的银行”的职能主要是指()。
•Readthetextbelowabouthowtodenycustomers’claims.•Inmostofthelines34—45thereisoneextraword.Itiseithergr
最新回复
(
0
)