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
2023-08-10
52
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/2913727.html
相关试题推荐
[originaltext][23]Americanswhoremember“thegoodolddays”arenotalonein
[originaltext][20]Thereisnodoubtthatadults,andevenhighlyeducatedadul
[originaltext]Hi,everybody.It’sthemostwonderfultimeoftheyear.Notjust
[originaltext]Hi,everybody.It’sthemostwonderfultimeoftheyear.Notjust
[originaltext]Hi,everybody.It’sthemostwonderfultimeoftheyear.Notjust
[originaltext][13]Atfirst,mostAmericansdidn’tthinktherewasanythingpar
[originaltext][13]Atfirst,mostAmericansdidn’tthinktherewasanythingpar
[originaltext]Wethinkofaerobicsasbeingahighimpactactivitybutactually
[originaltext]Wethinkofaerobicsasbeingahighimpactactivitybutactually
[originaltext]Wethinkofaerobicsasbeingahighimpactactivitybutactually
随机试题
Robert______whathewanted,buthegaveupatthelastminute.A、mightgetB、ma
ProfessorBhattandRobMeakinhavedevelopedamethodto______.[br]Howdoes
Everyboyandeverygirl______.(有权获得九年义务教育)isentitledto(或hastherighttor
甲公司许可乙公司使用其注册商标“阿凡”,乙公司必须()A.在使用“阿凡”商标
女,4岁,烧伤总面积70%,1小时后送入当地卫生院并准备转送上级医院治疗,当地卫
下列关于马可维茨投资组合分析模型的说法,不正确的是()。A、投资组合具有一个特
既能利尿通淋,又能清解暑热,收湿敛疮的药物是A.茯苓 B.猪苓 C.滑石
运用泊松分布设计的控制图是()。 A.单值X图B.p控制图 C.s控制图
利用概率样本数据推断全国居民人均消费支出,适用的统计学方法是()A.参数估计
下列关于从业人员安全培训的表述中,不符合《生产经营单位安全培训规定》规定的是(
最新回复
(
0
)