首页
登录
职称英语
[originaltext] I’m going to pass this piece of amber around so you can see th
[originaltext] I’m going to pass this piece of amber around so you can see th
游客
2024-04-02
48
管理
问题
I’m going to pass this piece of amber around so you can see this spider trapped inside it. It’s a good example of amber-inclusion, one of the inclusions that scientists are interested in these days. This particular piece is estimated to be about 20 million years old. Please be extremely careful not to drop it. Amber shatters as easily as glass. One thing I really like about amber is its beautiful golden color. Now, how does the spider get in there? Amber is really fossilized tree resin. Lots of chunks of amber contain insects like this one or animal parts like feathers or even plants. Here is how it happens. The resin oozes out of the tree and the spider or leaf gets in cased in it. Over millions and millions of years, the resin hardens and fossilizes into the precious stone you see here. Ambers can be found in many different places around the world. But the oldest deposits are right here in the United States, in Appalachia. It’ s found in several other countries, too, though right now scientists are most interested in ambers coming from the Dominican Republic. Because it has a great many inclusions, something likes one insect inclusion for every one hundred pieces. One possible explanation for this it that the climate is tropical and a greater variety of number of insects thrive in tropics than in other places. What’s really interesting is the scientists are now able to recover DNA from these fossils and study the genetic material for important clues to revolution.
Now listen to the following recording and answer questions 16 to 19.
16. Why does the professor pass the amber around to the students?
17. What is amber derived from?
18. Why is the Dominican Republic an important source of amber?
19. What type of amber is probably the most valuable for genetic research?
选项
A、So they can feel its weight.
B、So they can examine its contents.
C、So they can guess its age.
D、So they can admire its beautiful color.
答案
B
解析
细节题。根据I’m going to pass this piece of amber around so you can see this spider trapped inside it.可知,教授让学生传看琥珀是为了让他们看清里面被困的蜘蛛。因此,正确答案为B。
转载请注明原文地址:http://tihaiku.com/zcyy/3537235.html
相关试题推荐
[originaltext]Nowwe’vebeentalkingabouttherevolutionaryperiodinthe
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseeth
[originaltext]AnewenemyisthreateningJapanesetraditions:leisure.Aspa
[originaltext]AnewenemyisthreateningJapanesetraditions:leisure.Aspa
[originaltext]AnewenemyisthreateningJapanesetraditions:leisure.Aspa
[originaltext]AnewenemyisthreateningJapanesetraditions:leisure.Aspa
[originaltext]Thereareseveralwaysyoucanfindoutaboutthecountriesan
[originaltext]M:SoJanice,youwerelookingatidentifyingdifferenttalentsi
[originaltext]W:MayIhelpyou?M:Yes.Iwouldliketoapplyforoneofthese
[originaltext]W:MayIhelpyou?M:Yes.Iwouldliketoapplyforoneofthese
随机试题
Wherearethetwospeakers?[br][originaltext]M:Itissocrowdedhere.Isit
Hedidnottellhisparentsbecauseheknewtheywouldtrytochangehismindbu
[img]2016m3x/ct_eyyjsbz2013c_eyyjsbreadb_0033_20163[/img]Inthepast,hunti
[originaltext](5)AsthetrafficinNairobiworsens,primaryschoolpupils
Growingconcernsoverthesafetyandefficacyofanti-depressantdrugsprescr
属于社会理想的是()A、科学发展观 B、社会主义初级阶段 C、小康社会
成立股份有限公司,向公司登记机关登记的应该是: A全体股东指定的代表 B
唯物主义认识论有两个基本观点,其中一个是主张认识是主体对客体的反映,另一个是主张
在理财师与客户面谈沟通时,需要注意的问题有( )。A.理财师在面见客户前需要在
一般资料:求助者,女性,28岁,本科学历,公司职员。 案例介绍:求助者漂亮,人
最新回复
(
0
)