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
2025-02-09
33
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 semiprecious(次珍贵的、准宝石的) 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(阿巴拉契亚). It’s found in several other countries, too, though right now scientists are most interested in ambers coming from the Dominican Republic(多美尼加共和国). Because it has a great many inclusions, something like 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.
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
Why does the professor pass the amber around to the students?
转载请注明原文地址:https://tihaiku.com/zcyy/3949201.html
相关试题推荐
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseet
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseet
[originaltext]I’mgoingtopassthispieceofamberaroundsoyoucanseet
[originaltext]M:DoyouwanttothemovieswithonSaturday?W:Thanks,butI
[originaltext]M:DoyouwanttothemovieswithonSaturday?W:Thanks,butI
[originaltext]About200yearsago,theUnitedStateseconomywasgrowingqu
[originaltext]About200yearsago,theUnitedStateseconomywasgrowingqu
[originaltext]About200yearsago,theUnitedStateseconomywasgrowingqu
[originaltext]Today,wearegoingtocontinueourdiscussionofBuddhism.I
[originaltext]Today,wearegoingtotalkaboutaspecialwaysomeplantsr
随机试题
LeicesterSocietyofArts
【S1】[br]【S8】H根据上文的内容可以判断Ms.Mitchell儿子和他的朋友的成绩不好,因此他们应该是不怎么成功的,答案选successful。
ShegotmarriedwithaforeigneralthoughherparentshadnotgivenhertheirA、p
在基本SQL语言中,不可以实现()。A.查询视图和基表 B.并发控制 C.定
项目管理的目的是达到项目要求,项目要求体现在()。A.项目实施前能确定项目支
阅读案例,按要求作答。 辛老师了解到学生小丁学习基础较差,且因家境贫寒导致自卑
赵女士在网上购买了一件衣服,快递员会在上午10:00~11:00之间送达,而赵女
企业的技术改造可以分为表层、内层和深层三个层次。深层的技术改造主要包括()。
奇经八脉中与脑、髓、肾关系密切的是A.带脉 B.冲脉 C.任脉 D.督脉
低压交流电动机启动时,其配电母线上的电压尚应保证接触器线圓的电压不低于().A
最新回复
(
0
)