时间:2018-12-29 作者:英语课 分类:新视野大学英语:视听说教程 4


英语课



III. Listening In

Task 1: Stem Cell Research

Script

Gregory: The Republican party in America is opposing stem cell research. I find it

       hard to believe that in this day and age, someone would do that.

Lillian: Stem cell research sounds pretty impressive, I’ll admit. But just what is it?

Gregory: Well, a stem cell is a special type of cell. It is a general cell that, when it

       devides, can become any specific type of cell.

Lillian: You mean, a stem cell can become a heart cell? Or a brain or a kidney cell?

Gregory: That’s about it. Stem cells are a part of the body’s maintenance and repair

       system. When they divide, they can become any cell type.

Lillian: I guess there would be some tremendous medical advantages in that sort of

      research.

Gregory: You’ve said a mouthful. Recently, scientists were able to help a man who

       lost a jawbone for cancer. They recreated bone material for his jaw 1 from stem cells. What it means is that since the new bone was created out of the person’s own cells, there was no problem with rejection 2 because the DNA 3 was the same.

Lillian: I bet the person was delighted. Why would anyone oppose that sort of research? It would seem to have endless potential to benefit the human race.

Gregory: I agree, but there are people who think we should not interfere 4 with nature and manipulate “what is natural”.

Lillian: It’s easier to hold such a narrow view if you’re not in a position to need the benefits of the research. If you’re missing a jawbone because of cancer, you probably support the research.


 


1. What is the passage mainly about?

2. Who is against stem cell research?

3. What is special about a stem cell?

4. When can a stem cell become another cell type?

5. According to the passage, why do some people oppose stem cell research?

Keys: 1.B  2.A  3.A  4.A  5.D



n.颚,颌,说教,流言蜚语;v.喋喋不休,教训
  • He delivered a right hook to his opponent's jaw.他给了对方下巴一记右钩拳。
  • A strong square jaw is a sign of firm character.强健的方下巴是刚毅性格的标志。
n.拒绝,被拒,抛弃,被弃
  • He decided not to approach her for fear of rejection.他因怕遭拒绝决定不再去找她。
  • The rejection plunged her into the dark depths of despair.遭到拒绝使她陷入了绝望的深渊。
(缩)deoxyribonucleic acid 脱氧核糖核酸
  • DNA is stored in the nucleus of a cell.脱氧核糖核酸储存于细胞的细胞核里。
  • Gene mutations are alterations in the DNA code.基因突变是指DNA密码的改变。
v.(in)干涉,干预;(with)妨碍,打扰
  • If we interfere, it may do more harm than good.如果我们干预的话,可能弊多利少。
  • When others interfere in the affair,it always makes troubles. 别人一卷入这一事件,棘手的事情就来了。
学英语单词
3-Diethylamino-propanol
Acer guizhouense
Aldissian
annelism
answer delay
antitriplets
anx
Association for Computing Machinery
baghettis
ballestras
be sound on the goose
biogenetically
blowing-out of arc
bonded nonwoven substrate
Bubullima
cacaerometer
calcium reversal lines
carbide tipped center
carve for oneself
clery
coating streak
colic band
cooking
crushed head
discompassionate
disisolation
division of series
end-fire helical antenna
enoyl hydrase
entrenched interests
etched pothole
excusest
extoparasite
flatterest
four-tube camera
fund adjustement
genus chimaphilas
grouted-aggregate concrete
Heliamphora
heterotroph
horizontal-axle current meter
intraphase temperature
Islamic Great Eastern Raiders-Front
kallinikos
Kanakanak
lacticolor
length-diameter ratio
lepinotus inquilinus
life-one
little yellow croaker
livio
location based service
lower priority group
Lymphangiomyoma
megalithic fathom
metaplasmic cell content
misparaphrase
mofe
mound builders
Murray Fracture Zone
narrow molecular-weight distribution
newgar
nickman
not listed
out-page access
party in bankruptcy
piggybanks
placenta praevia marginalis
polyemia polycythaemiea
potcal pot calcination
precht
private-viewing
pseudo-annual ring
put to nurse
radio-noise map
re-enacting
real domain
real part condition
reason of state
Rosenberg starting
ruz
skewed peak
South Hātia I.
spacecuts
spiral flow aeration
stand in the way
sub-ledgers
subcapsular cataract
superconducting coil
synthetic maps
turn the best side outward
type-sites
unpumped
unrhyme
utility rooms
velvet spider
wasichu
waveguide bolometer unit
winding mouldboard
wrest pin
yard grasses
Yvon photometer