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
Choose the correct letter, A, B or C. Project on using natural dyes to colour fabrics What problem did Jim have with using tart
Choose the correct letter, A, B or C. Project on using natural dyes to colour fabrics What problem did Jim have with using tart
admin
2018-05-28
39
问题
Choose the correct letter, A, B or C.
Project on using natural dyes to colour fabrics
What problem did Jim have with using tartrazine as a fabric dye?
TUTOR: OK, Jim. You wanted to see me about your textile design project.
JIM: That’s right. I’ve been looking at how a range of natural dyes can be used to colour fabrics like cotton and wool.
TUTOR: Why did you choose that topic?
JIM: Well, I got a lot of useful ideas from the museum, you know, at that exhibition of textiles. But I’ve always been interested in anything to do with colour. Years ago,
I went to a carpet shop with my parents when we were on holiday in Turkey, and I Q21 remember all the amazing colours.
TUTOR: They might not all have been natural dyes.
JIM: Maybe not, but for the project I decided to follow it up. And I found a great book about a botanic garden in California that specialises in plants used for dyes.
TUTOR: OK. So, in your project, you had to include a practical investigation.
JIM: Yeah. At first I couldn’t decide on my variables. I was going to just look at one type of fibre for example, like cotton ...
TUTOR: ... and see how different types of dyes affected it?
JIM: Yes.
Then I decided to include others as well, so I looked at cotton and wool and Q22 nylon.
TUTOR:
With just one type of dye?
JIM:
Various types
, including some that weren’t natural, for comparison.
TUTOR: OK.
JIM: So, I did the experiments last week. I used some ready-made natural dyes, I found a website which supplied them, they came in just a few days, but I also made some of my own.
TUTOR: That must have taken quite a bit of time.
JIM: Yes, I’d thought it’d just be a matter of a teaspoon or so of dye, and actually that wasn’t the case at all.
Like I was using one vegetable, beetroot, for a red dye, and I Q23 had to chop up a whole pile of it.
So it all took longer than I’d expected.
TUTOR: One possibility is to use food colourings.
JIM: I did use one. That was a yellow dye, an artificial one.
TUTOR: Tartrazine?
JIM: Yeah. I used it on cotton first. It came out a great colour,
but when I rinsed the Q24 material, the colour just washed away.
I’d been going to try it out on nylon, but I abandoned that idea.
TUTOR: Were you worried about health issues?
JIM: I’d thought if it’s a legal food colouring, it must be safe.
TUTOR: Well, it can occasionally cause allergic reactions, I believe.
TUTOR: So what natural dyes did you look at?
JIM: Well, one was turmeric. The colour’s great, it’s a really strong yellow. It’s generally used in dishes like curry.
TUTOR: It’s meant to be quite good for your health when eaten, but you might find
it’s not Q25 permanent when it’s used as a dve - a few washes, and it’s gone.
JIM: Right. I used beetroot as a dye for wool. When I chop up beetroot to eat I always end up with bright red hands,
but the wool ended up just a sort of watery cream Q26 shade.
Disappointing.
TUTOR: There’s a natural dye called Tyrian purple. Have you heard of that?
JIM: Yes. It comes from a shellfish, and it was worn in ancient times but only by important people as
it was so rare. I didn’t use it.
Q27
TUTOR:
It fell out of use centuries ago
, though one researcher managed to get hold of some recently. But that shade of purple can be produced by chemical dyes nowadays. Did you use any black dyes?
JIM: Logwood. That was quite complicated. I had to prepare the fabric so the dye would take.
TUTOR: I hope you were careful to wear gloves.
JIM: Yes. I know the danger with that dye.
TUTOR: Good.
It can be extremely dangerous if it’s ingested.
Now, presumably you had a Q28 look at an insect-based dye? Like cochineal, for example?
JIM: Yes. I didn’t actually make that, I didn’t have time to start crushing up insects to get the red colour and anyway they’re not available here, but I managed to get the dye quite easily from a website.
But it cost a fortune.
I can see why it’s generally just Q29 used in cooking, and in small quantities.
TUTOR: Yes, it’s very effective, but that’s precisely why it’s not used as a dye.
JIM: I also read about using metal oxide. Apparently you can allow iron to rust while it’s in contact with the fabric, and that colours it.
TUTOR: Yes, that works well for dying cotton. But you have to be careful as
the metal can Q30 actually affect the fabric
and so you can’t expect to get a lot of wear out of fabrics treated in this way. And the colours are quite subtle, not everyone likes them.
Anyway, it looks as if you’ve done a lot of work ...
选项
A、It caused a slight allergic reaction.
B、It was not a permanent dye on cotton.
C、It was ineffective when used on nylon.
答案
B
解析
首先听到定位词tartrazine,然后听到Jim说“…I used it on cotton first.It came out a great colour,but when I rinsed the material,the colour just washed away.”,其中the colour just washed away对应B选项的not a permanent dye,因此答案为B。另外,后面还出现了“I’d been…on nylon,but I abandoned that idea.”,可排除C。最后还出现了A选项中的allergic reaction,但是是导师提及的,Jim在使用Tartrazine作为染料的过程中并未发生过敏现象,因此可排除A。
转载请注明原文地址:https://jikaoti.com/ti/oKAYFFFM
本试题收录于:
雅思听力题库雅思(IELTS)分类
0
雅思听力
雅思(IELTS)
相关试题推荐
READINGPASSAGE2Youshouldspendabout20minutesonQuestions14-26whicharebasedonReadingPassage2below.
Questions1-8Completethesummarybelow.ChooseONEorTWOWORDSfromthepassageforeachanswer.Writeyouranswersinboxes
Questions1-8Completethesummarybelow.ChooseONEorTWOWORDSfromthepassageforeachanswer.Writeyouranswersinboxes
Questions1-8Completethesummarybelow.ChooseONEorTWOWORDSfromthepassageforeachanswer.Writeyouranswersinboxes
Questions27-30Foreachquestion,onlyONEofthechoicesiscorrect.Writethecorrespondingletterintheappropriateboxon
READINGPASSAGE3Youshouldspendabout20minutesonQuestions27-40,whicharebasedonReadingPassage3below.
Questions1-4Thetexthas7paragraphs(A-G).Whichparagraphcontainseachofthefollowingpiecesofinformation?*
Questions27-30Foreachquestion,onlyONEofthechoicesiscorrect.Writethecorrespondingletterintheappropriateboxon
READINGPASSAGE3Youshouldspendabout20minutesonQuestions28-40whicharebasedonReadingPassage3below. Me
READINGPASSAGE1Youshouldspendabout20minutesonQuestions1-13whicharebasedonReadingPassage1below.
随机试题
某家电企业围绕家电市场,生产电视机、洗衣机、电冰箱、空调等系列家电产品,该企业采取的是()。
关于x线照片颗粒度的叙述,错误的是
1岁半男婴,发热3天,伴咳嗽,流涕,眼结膜充血,流泪,半天前发现患儿耳后、颈部、发缘有稀疏的不规则红色丘斑疹,疹间皮肤正常,体温39.7℃,心肺正常。护士告诉家长患儿疹退后的皮肤改变,正确的是
根据企业破产法律制度的规定,下列各项中,应当召开债权人会议的情形有:()
贷记卡持卡人选择最低还款额方式用卡的,不再享受免息还款期待遇。()
四十三年,望中犹记,___________。(辛弃疾《永遇乐.京口北固亭怀古》)
中共“一大”确定的党的中心工作是()。
“在社会主义条件下搞市场经济,世界上还没有先例,这是一个伟大的实验和艰辛的创造,许多规律性的东西我们还不熟悉。西方发达国家发展市场经济的那些合乎市场一般规律的成功经验和合理做法,我们正在积极学习和借鉴。”这里的“成功经验和合理做法”具体是指
软件测试的白箱测试是对软件的结构进行测试,下述Ⅰ.边缘值分析 Ⅱ.语句测试 Ⅲ.分支测试 Ⅳ.路径测试哪个(些)是其应包括的内容?
有如下类和变量定义:classParents{public:intpublicData;private:intprivateData;};
最新回复
(
0
)