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
2023-08-15
40
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、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/2926979.html
相关试题推荐
[originaltext]Duringtheproductionofspeech,whenbabieslisten,whatthe
[originaltext]Geniusesaregettingbrighter.AndatgeniuslevelsofIQ,gi
[originaltext][16]WhatIfearedmostformyselfatyouragewasnotpoverty
[originaltext][16]WhatIfearedmostformyselfatyouragewasnotpoverty
[originaltext]Currentstudiesshowthatwhatgoesonlabelsisanimportant
[originaltext]Currentstudiesshowthatwhatgoesonlabelsisanimportant
[originaltext]Currentstudiesshowthatwhatgoesonlabelsisanimportant
[originaltext]I’msureyourealizethatyourresearchpapersaredueinsix
[originaltext]M:Hi,Janet,wherewereyouatlunchtime?Iwassavingaseatf
[originaltext]M:Hi,Janet,wherewereyouatlunchtime?Iwassavingaseatf
随机试题
His______breathingshowedthathehadgotoverhisexcitement.A、smoothB、averag
某高等院校学生钱某考试作弊,但学校一直未予除名,钱某在毕业时,学校不颁发毕业证书
某植物叶片上气孔的开放和关闭情况如图4所示,箭头表示某种物质的运动方向,则这种物
患者腹部痞胀,纳呆呕恶,肢体困重,身热起伏,汗出热不解,溲黄便溏。其舌象应是A:
有关对界面含义描述正确的有()。A:界面首先出现在工程技术领域 B:界面是子
根据《水利水电工程地质勘察规范》(GB50487—2008),下列哪些选项属于
虾游脉的脉象是A.如釜中沸水,浮泛无根 B.小而坚搏,如循薏苡子 C.如屋漏
转换贴水表明()A:基准股份高于转换平价的部分B:转换平价高于基准股价的部分
美国和我国香港证券市场采用的滚动交收周期分别为T+3和T+2。()
编写教科书和教师进行教学的直接依据是()。 A.课程目标 B.教学目标 C
最新回复
(
0
)