问题 填空题

近日,油炸薯条再次出现食品安全危机,因为其中反式脂肪酸(transfattyacids简称TFA)的含量增加了

1
3
.中国食疗网发布“反式脂肪酸预警报告”,报告称:摄入过多的反式脂肪酸,容易堵塞血管而导致心脑血管疾病.顺式脂肪酸、反式脂肪酸的结构如图所示.

试回答下列问题:

(1)顺(反)式脂肪酸中所含官能团名称是______.

(2)与上述顺(反)式脂肪酸互为同系物的最简单物质的结构简式为______.

(3)上述顺式与反式脂肪酸都能与H2在一定条件下发生氢化反应,其产物关系为______.

A.同分异构体B.同系物C.同一种物质D.同素异形体

(4)据专家介绍,多食用花生油对人体有益,是因为花生油中含反式脂肪酸较少,且含有对人体有益的白藜芦醇(化学名称为芪三酚),其结构简式为:则1mol白藜芦醇与足量溴水发生反应最多消耗______mol溴,可以与______mol氢气加成.

答案

(1)顺(反)式脂肪酸中含有C=C和-COOH,名称分别为碳碳双键、羧基,故答案为:羧基、碳碳双键;

(2)有机物中含有C=C和-COOH,同系物中最简单的有机物为CH2=CH-COOH故答案为:CH2=CH-COOH;

(3)两种物质加成后都无侧链,且-COOH都在顶端,则为同种物质,故答案为:C;

(4)含有3个酚羟基,共有5个邻、对位的H可被取代,含有C=C,可与溴水发生加成反应,含有2个苯环,和1个C=C,则1mol白藜芦醇与足量溴水发生反应最多消耗6mol溴,可以与7mol氢气发生加成反应,故答案为:6;7.

选择题
完形填空
Do you like doing shopping? Have you ever had to decide whether to go shopping or stay at home and watch TV on a weekend? Now you __16__ do both at the same time. Home shopping television networks have become a __17__ for many people to shop without __18__ having to leave their homes, and you never thought it’s so convenient.
Some shoppers are __19__ of department stores and supermarkets— __20__ the crowds, waiting in long lines, and sometimes having slight __21__ of finding anything they want to buy. They’d rather sit quietly at home in front of the TV set and __22__ a friendly announcer describe a product __23__ a model shows it. And they can __24__ around the clock, buying something __25__ by making a phone call.
Department stores and even mail-under companies are __26__ to join in the success of home shopping. Large department stores are busy __27__ their own TV channels to encourage TV shopping in the future. __28__ can ask questions about products and place __29__, all through their TV sets.
Will shopping by television __30__ take the place of shopping in stores? Some people are still concerned about that. Just only some industry managers think so. __31__ many people find shopping at a __32__ store a great enjoyment. And for many shoppers, it is still important to __33__ or try on dresses they want to buy. That’s __34__ specialists say that in the future, home shopping will __35__ together with store shopping but will never entirely replace it. Let’s wait and see it.
小题1:
A.must
B.should
C.shall
D.can
小题2:
A.program
B.way
C.reason
D.purpose
小题3:
A.ever
B.never
C.still
D.once
小题4:
A.proud
B.fond
C.tired
D.careful
小题5:
A.fighting
B.striking
C.treating
D.stopping
小题6:
A.sense
B.doubt
C.hope
D.feeling
小题7:
A.see
B.watch
C.let
D.notice
小题8:
A.until
B.since
C.if
D.while
小题9:
A.shop
B.wait
C.turn
D.deliver
小题10:
A.suitably
B.cheaply
C.simply
D.hardly
小题11:
A.nervous
B.lucky
C.equal
D.eager
小题12:
A.putting up
B.making up
C.setting up
D.looking up
小题13:
A.Guests
B.Assistants
C.Managers
D.Customers
小题14:
A.orders
B.goods
C.books
D.answers
小题15:
A.lastly
B.finally
C.especially
D.fortunately
小题16:
A.Then
B.Yet
C.However
D.Therefore
小题17:
A.general
B.popular
C.real
D.true
小题18:
A.design
B.make
C.wear
D.touch
小题19:
A.how
B.why
C.what
D.when
小题20:
A.exist
B.practice
C.follow
D.appear