首页
登录
职称英语
Complete the notes below.Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each
Complete the notes below.Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each
游客
2025-02-12
26
管理
问题
Complete the notes below.
Write NO MORE THAN TWO WORDS AND/OR A NUMBER for each answer.
An Overview of The Research on Amber
Amber: a fossilised tree resin, which may be produced to protect itself against 【L31】______and fungi.
Colors
usual yellow, orange, or brown
uncommon colors e.g. blue(what causes the blue color in amber is related to the occurrence of 【L32】______.)
Formation
under sustained 【L33】______and pressure
during an 【L34】______stage between resins and amber, copal is produced.
Places and Conditions
commonly found on 【L35】______e.g. in Russia
avoid exposure to 【L36】______, rain, and temperate extremes
Inclusions
Dominican amber: 1 inclusion to every 100 pieces
Baltic amber: 1 inclusion to every 【L37】______pieces
Uses and Applications
It can be used to make ornamental objects and jewelry in 【L38】______settings.
Some people believe that its powder mixed with 【L39】______cures throat, eye and ear diseases.
It has even been used as a 【L40】______material, for instance using it to create Amber Room. [br] 【L37】
Tonight I’m going to present an overview of the research on amber. Okay, I’ll start by giving a brief introduction about amber, then talk about the formation of amber, and then describe amber’s applications in different fields.
First of all, what is amber? Amber is not a stone, but is ancient, fossilised tree resin, which is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant. And why is resin produced? Although there are contrasting views as to why resin is produced, it is a plant’s protection mechanism. The resin may be produced to protect the tree from disease and injury inflicted by insects and fungi.
Amber occurs in a range of different colors. Besides the usual yellow, orange, and brown, other uncommon colors are also associated with it. Interestingly, blue amber, the rarest Dominican amber, is highly sought after. It is only found in Santiago, Dominican Republic. There are several theories about what causes the blue color in amber. The most common one links it to the occurrence of volcanic dust that was present when the resin was first pressed out from hymenaea protera millions of years ago.
At this point, you might be curious about how amber is formed. Molecular polymerisation, resulting from high pressures and temperatures produced by overlying sediment, transforms the resin first into copal. Sustained heat and pressure drives off terpenes and results in the formation of amber. Copal that I’ve just mentioned is also a tree resin but it hasn’t fully fossilised to amber. More generally, the term copal describes resinous substances in an intermediate stage of polymerisation and hardening between "gummier" resins and amber.
So where can we find amber? It can be found on sea shores. The main producer worldwide is Russia. In fact about 90% of the world’s available amber is located in the Kaliningrad region of Russia, which is located on the Baltic. Here, the resin is washed up on the coast after being dislodged from the ocean floor by years of water and ocean currents. However, exposure to sunlight, rain, and temperate extremes tends to disintegrate resin. This also indicates that amber is not really an ideal fossil preservative for most uses.
We’ve already learned that amber is made of tree resin. It often includes insects that were trapped within the tree many millions of years ago. A piece with a visible and well-arranged insect is generally valued much higher than simple, solid amber. One Dominican amber source reported finding a butterfly with a five-inch wing spread; this is both a large and unusual find; most butterfly specimens have no more than a two-inch wingspan. Inclusions in Dominican amber are numerous - 1 inclusion to every 100 pieces; Baltic amber contains approximately 1 inclusion to every 1,000 pieces.
Now that you have a basic knowledge of amber, I’d like to talk a bit about amber’s applications in different fields. First, amber is appreciated for its color and beauty. Good quality amber is used to manufacture ornamental objects and jewelry, for instance using a variety of exclusive first class quality natural Baltic amber with silver to make natural amber jewelry. But due to the biodegradation of Amber fossils, people with amber jewelry have to take special care of it, to ensure that the amber is not damaged.
It was previously believed that amber worn on the neck served to protect one from diseases of the throat and preserved the sound mind. Kalistrate, a famous doctor in the Roman Empire wrote that amber powder mixed with honey cures throat, eye and ear diseases, and if it is taken with water, eases stomachache. While the mystery around that use of amber has not been cleared, one thing is sure: it will help effectively to defeat small malaises.
Amber has even been used as a building material. Amber created the altar in St. Brygida Church in Gdansk, Poland. In St. Petersburg, Russia, the walls of the famous Amber Room were lined with intricate carvings and inlaid designs. This palace room is being reconstructed from photographs, and can be visited at the Catherine Palace, located in the town of Tsarskoye Selo.
And finally, the fourth use of amber is that...
选项
答案
1000
解析
1 000本题为数字题,考查小标题“Inclusions”下第二点的细节信息。按照题号顺序原则,第一点报完才会到此题,且有专有名词“Baltic”帮助定位,答案比较容易抓取。
转载请注明原文地址:https://tihaiku.com/zcyy/3953632.html
相关试题推荐
Completetheformbelow.WriteONEWORDAND/ORANUMBERforeachanswer.[img]20
Completetheformbelow.WriteONEWORDAND/ORANUMBERforeachanswer.[img]20
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethetablebelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeac
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeach
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeach
随机试题
Despite(1)thatalcoholicbeveragesmay(2),aleadingmedicalexpertisa
Inthefirstincident,thecouplehadplannedtospendtheirweekendtogether__
旗袍(cheong—Sam)源自清代满族(Manchu)女性服饰,被誉为中国传统服饰(habilatory)文化的典范。它不仅在整体造型的风格方面符合中
第一代工业设计师产生于美国,时间大约是在20世纪()年代前后。A.20 B.3
无线电通信,存在易于截获、窃听等问题,对重要保密通信,应采取终端保密措施。
对于商业、旅游、娱乐、商业住宅等经营性用地,一般应该采用( )方式获取土地使用
生产商甲在销售商品给销售商乙时,限定乙将商品转售给第三人的单价不得低于500元。
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
某工程主体结构混凝土工程量为3200m3,预算单价为550元/m3,计划4个月内
管道进行气压试验的正确步骤是( )。A.缓慢升压至试验压力的30%→按试验压力
最新回复
(
0
)