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
15
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://www.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
AsaprofessoratalargeAmericanuniversity,Ioftenhearstudentssaying:
FoodsThatFightDiseaseWithremarkableco
土工织物调湿时的相对温度为()。A.20±5℃ B.(20±2)℃ C
关于大连接体下列说法错误的是()A.连接牙弓两侧各部件成一整体 B.直接
()不属于按照投资性质的不同对理财产品进行的分类。A.固定收益类理财产品 B
已知中心在坐标原点0的椭圆C经过点A(2,3)且点F(2,0)为其右焦点。
某套住房建筑面积为120m2,单价为12000元/m2,购房人最低首付比例为30
关于外用制剂临床适应证的说法,错误的是A.冻疮软膏适用于中度破溃的冻疮、手足皲裂
甲公司所得税税率为25%。2×19年年初“预计负债——产品质量保证”账面余额为5
为监理人提供用车、办公设施和生活设施等需要采用估价法进行工程计量,下列关于估价法
最新回复
(
0
)