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
2024-04-06
6
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:https://tihaiku.com/zcyy/3543238.html
相关试题推荐
[originaltext]Letmewarnyouagainstamistakethathistoriansofscienceo
[originaltext]Letmewarnyouagainstamistakethathistoriansofscienceo
[originaltext]Letmewarnyouagainstamistakethathistoriansofscienceo
[originaltext]Nowwe’vebeentalkingabouttherevolutionaryperiodinthe
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseeth
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseeth
[originaltext]Californiaisalandofvarietyandcontrast.Almosteverytyp
[originaltext]VietnameseauthoritiesreportedonMondaythatbirdfluhassp
[originaltext]M:SoJanice,youwerelookingatidentifyingdifferenttalentsi
[originaltext]M:SoJanice,youwerelookingatidentifyingdifferenttalentsi
随机试题
NewDiscoveriesofPublicTransportA)Anewstudyconductedfor
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescie
为了保护劳动者的合法权益,根据我国劳动法、劳动合同法的规定,下列()属于不得解
根据《营业性演出管理条例实施细则》规定,个体演出经纪人可以持(),向户籍所
下列不属于证券公司损害客户利益的欺诈行为的是()。A.不在规定时间内向客户提供
某单位进行测量实行精准扶贫测量保障。 1.区域情况:该乡属山地区,森林覆盖
下列不属于影响消费者购买的社会文化因素的是( )。A.家庭 B.生活方式
下列关于热电厂选址原则的表述,错误的是()。A.热电厂应尽量不要占用荒地、
女,16岁。心悸,多汗,手颤2个月。无明显突眼,甲状腺I°弥漫性肿大。血游离T
以下关于复方托吡卡胺的描述,正确的是A.高血压、动脉硬化、冠状动脉供血不足者慎用
最新回复
(
0
)