首页
登录
职称英语
[originaltext] I’m going to pass this piece of amber around so you can see t
[originaltext] I’m going to pass this piece of amber around so you can see t
游客
2023-08-16
24
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 preciousstone 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、Tropical insects.
B、Decayed leaves.
C、Tree resin.
D、Bird feathers.
答案
C
解析
细节题。题目问琥珀是如何形成的,根据Amber is really fossilized tree resin.可知,琥珀其实是树脂化石。因此,正确答案为C。
转载请注明原文地址:https://tihaiku.com/zcyy/2931080.html
相关试题推荐
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’
Theideaofusingyourdishwashertocookamealhasbeenaroundsincethe’
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]Ifyou’recarefulenough,you’llfindthatitiscommonnowad
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
[originaltext]Peter:(19)ThelawontaxisisveryinterestingandIknowinLon
随机试题
[originaltext]M:Hello,Mrs.White,whatcanIdoforyou?W:Idon’tknowwhat
()向网络新闻组投稿()选定域名[br]()寻求交互式链接
A.黏膜表面白色凝乳状假膜 B.黏膜表面呈白色网状条纹 C.黏膜表面针尖大小
下列有关金融期权的表述正确的是( )。 Ⅰ、期权的买方在支付了期权费后,就获
A.40%B.70%C.30%D.50%E.60%空气相对湿度在()以下时,含
下列关于行政赔偿程序的说法错误的是()。A.赔偿请求人要求赔偿,应当先向赔偿义务
对客户信用评级方法而言,与传统的专家分析方法相比,违约概率模型能够直接估计客户的
下列说法正确的有()A.甲将摩托车借给李某,后又从李某处窃回。甲认识到摩托
在科室预防交叉感染的讨论会上,大家查找工作中的问题,小马提出了最关键和最突出的是
有特异性抗原受体的细胞是 A.NK细胞、T细胞 B.浆细胞、单核吞噬细胞
最新回复
(
0
)