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
46
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".
It was that book which
the disabled girl learned the real meaning of life.
选项
A、It was from that book that
B、That was from that book
C、It was the book that
D、That was the book
答案
A
解析
转载请注明原文地址:https://jikaoti.com/ti/9IwYFFFM
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
Inadditiontointernationalbankingand______,Panamaisalsoknownforgrowingbananas.
Customersareentitledtoreceiveadditionalcreditservices______maintaintheiraccountingoodstanding.
Howdoestheprofessordevelopthetopicoftheviolinfamily?Choosetwoanswers.
Whatisthelecturemainlyabout?Accordingtotheprofessor,whydidfifteenth-centurypaintersusedimpastotechniques?
Alibaba,China’secommercegroup,hascontinuedastringofdealsthatisdesignedtostrengthenitsappealaheadofanexpected
OldpeopleinThiengolysaytheycanrememberwhenthereweresomanytreesthatyoucouldn’tseethesky.Now,milesofreddish
Sincewritinghometotheirparentsformoney,theyhadlived______hope.
Alllivingcreaturespassoninheritedtraitsfromonegenerationtoother.
Alinesegment,whichispartofastraightline,beginsatonepointendingatanother.
Laurelleavesarestillanemblemofvictory.
随机试题
红细胞渗透脆性降低见于()。
政府和社会资本投资人的合同体系是()的重点,需要对双方合作的核心边界条件,项目全生命周期不同阶段各方的权利、义务等进行约定。
目前我国银行信贷管理一般实行集中授权管理、统一授信管理、()、贷款管理责任制相结合,以切实防范、控制和化解贷款业务风险。
在我国现阶段,关于股份制的正确说法有( )。
给定材料:继“世界那么大,我想去看看”之后,各种版本的诗意辞职信也不断涌现。花样翻新的辞职信虽然个性张扬,夺人眼球,但在另一些网友和职工看来却并不合适。曾有过一次辞职经历的职工胡先生认为,就算决定辞职也应该站好“最后一班岗”,而辞职信代表着一份对
某市一位优秀的班主任李某,只因为按照规定减轻学生的负担,放手培养学生的创新能力,却使班级的综合成绩下降到年级组的倒数第二名,成为差班之一。压力之下,在寒假之前的家长会上,这位教师哭着向家长们鞠躬道歉,并表示今后将加大作业量。减轻学生学业负担,提高学生综
下列各项中,不属于静态投资回收期优点的是()。
在人人都有发言权的微博时代,一个不经意的转发和评论,既可能为真相增添力量,也可能不小心成为谣言的帮闲,甚至可能成为他人的灾难。该如何更好地行使自己的话语权,这是一个值得认真对待的问题。近日《中国青年报》有篇文章谈到,一旦被主观偏见、愤怒情绪、不假思索的责骂
队列长度为800米的行军速度为100米/分钟,可以确定通信员从队尾赶到排头时用的时间是4分钟.(1)通信员围400米的操场跑一圈要用分钟.(2)通信员与队伍逆向而行,从排头到队尾用2分钟.
Almosteverychild,onthefirstdayhesetsfootinaschoolbuilding,issmarter,more【B1】______,lessafraidofwhathedoesn
最新回复
(
0
)