Archaeologists used DNA taken from a broken clay pipe stem found in Maryland to build a picture of an enslaved woman who died around 200 years ago and had origins in modern-day Sierra Leone. One researcher called the work “a mind-blower.”
“In this particular context, and from that time period, I think it’s a first,” team member Hannes Schroeder told The Washington Post. “To be able to get DNA from an object like a pipe stem is quite exciting. Also it is exciting for descendant(后裔) communities. Through this technology, they’re able to make a connection not only to the site but potentially back to Africa.”
The pipe stem was found at the Belvoir plantation in Crownsville, Maryland, where enslaved people lived until 1864 and where a likely slave cemetery was recently found. DNA taken from the pipe linked back to a woman either directly from or descended from the Mende people, who lived in west Africa, in an area now part of Sierra Leone.
Julie Schablitsky, the chief archaeologist with the Maryland state highway administration, told The Post the discovery, based on saliva(唾液) absorbed into the clay pipe, was a “mind-blower”. She also said records show the existence of a slave trade route Sierra Leone to Annapolis, plied(定期往来) by British and American ships. “As soon as people stepped on those slave ships in Africa,” she said, “whether they were from Benin or whether they were from Sierra Leone, wherever they were from, that identity was lost. Their humanity is robbed. Who they are as a people has gone.”
The new analysis is part of ongoing research around Belvoir that has given descendants of the people enslaved there new insight into the lives of their ancestors. Speaking to The Post, Nancy Daniels, a genealogist from Laurel, Maryland, who thinks she is a descendant of enslaved families from Belvoir but was not linked to the research on the pipe, called the discovery “overwhelming.” “I’m sitting here about ready to cry,” she said. “I’m sorry. I'm so happy ... Thank God for the DNA.”
This year, events and ceremonies are being held to mark the 400th anniversary of the arrival of the first enslaved people in America, at Jamestown, Virginia, in 1619.
1.What does the phrase “a mind-blower” in paragraphs 1 and 4 refer to?
A.A surprise. B.A confusion.
C.An excitement. D.A fascination.
2.According to Hannes Schroeder, the pipe stem was of great significance because________.
A.it was the first direct evidence that slaves living in Maryland were originally from Africa
B.it helped the archaeologists to draw a portrait of the enslaved woman
C.it might contribute to identifying the birthplace of the descendant communities
D.it contained genetic clues to the ancestral background of its owner
3.What can be inferred from the passage?
A.The owner of the pipe once lived in what is now an area in west Africa.
B.The history of slavery in America is an ongoing topic of concern.
C.African slaves lost their identities when they arrived at the Belvoir plantation.
D.Nancy Daniels, a genealogist was sorry for not being involved in the research.
4.Which of the following is the best title for the passage?
A.DNA from an old pipe throws lights on the origins of the enslaved
B.A new research reveals the origins of enslaved African woman
C.The descendants of enslaved people seek their identities
D.DNA contributes to the breakthrough of a new research
高三英语阅读理解困难题
Archaeologists used DNA taken from a broken clay pipe stem found in Maryland to build a picture of an enslaved woman who died around 200 years ago and had origins in modern-day Sierra Leone. One researcher called the work “a mind-blower.”
“In this particular context, and from that time period, I think it’s a first,” team member Hannes Schroeder told The Washington Post. “To be able to get DNA from an object like a pipe stem is quite exciting. Also it is exciting for descendant(后裔) communities. Through this technology, they’re able to make a connection not only to the site but potentially back to Africa.”
The pipe stem was found at the Belvoir plantation in Crownsville, Maryland, where enslaved people lived until 1864 and where a likely slave cemetery was recently found. DNA taken from the pipe linked back to a woman either directly from or descended from the Mende people, who lived in west Africa, in an area now part of Sierra Leone.
Julie Schablitsky, the chief archaeologist with the Maryland state highway administration, told The Post the discovery, based on saliva(唾液) absorbed into the clay pipe, was a “mind-blower”. She also said records show the existence of a slave trade route Sierra Leone to Annapolis, plied(定期往来) by British and American ships. “As soon as people stepped on those slave ships in Africa,” she said, “whether they were from Benin or whether they were from Sierra Leone, wherever they were from, that identity was lost. Their humanity is robbed. Who they are as a people has gone.”
The new analysis is part of ongoing research around Belvoir that has given descendants of the people enslaved there new insight into the lives of their ancestors. Speaking to The Post, Nancy Daniels, a genealogist from Laurel, Maryland, who thinks she is a descendant of enslaved families from Belvoir but was not linked to the research on the pipe, called the discovery “overwhelming.” “I’m sitting here about ready to cry,” she said. “I’m sorry. I'm so happy ... Thank God for the DNA.”
This year, events and ceremonies are being held to mark the 400th anniversary of the arrival of the first enslaved people in America, at Jamestown, Virginia, in 1619.
1.What does the phrase “a mind-blower” in paragraphs 1 and 4 refer to?
A.A surprise. B.A confusion.
C.An excitement. D.A fascination.
2.According to Hannes Schroeder, the pipe stem was of great significance because________.
A.it was the first direct evidence that slaves living in Maryland were originally from Africa
B.it helped the archaeologists to draw a portrait of the enslaved woman
C.it might contribute to identifying the birthplace of the descendant communities
D.it contained genetic clues to the ancestral background of its owner
3.What can be inferred from the passage?
A.The owner of the pipe once lived in what is now an area in west Africa.
B.The history of slavery in America is an ongoing topic of concern.
C.African slaves lost their identities when they arrived at the Belvoir plantation.
D.Nancy Daniels, a genealogist was sorry for not being involved in the research.
4.Which of the following is the best title for the passage?
A.DNA from an old pipe throws lights on the origins of the enslaved
B.A new research reveals the origins of enslaved African woman
C.The descendants of enslaved people seek their identities
D.DNA contributes to the breakthrough of a new research
高三英语阅读理解困难题查看答案及解析
Archaeologists used DNA taken from a broken clay pipe stem found in Maryland to build a picture of an enslaved woman who died around 200 years ago and had origins in modern-day Sierra Leone. One researcher called the work “a mind-blower.”
“In this particular context, and from that time period, I think it's a first,” team member Hannes Schroeder told The Washington Post. “To be able to get DNA from an object like a pipe stem is quite exciting. Also it is exciting for descendant(后裔) communities... Through this technology, they're able to make a connection not only to the site but potentially back to Africa.”
The pipe stem was found at the Belvoir plantation in Crownsville, Maryland, where enslaved people lived until 1864 and where a likely slave cemetery was recently found. DNA taken from the pipe linked back to a woman either directly from or descended from the Mende people, who lived in west Africa, in an area now part of Sierra.
Julie Schablitsky, the chief archaeologist with the Maryland state highway administration, told The Post the discovery, based on saliva(唾液) absorbed into the clay pipe, was a “mind-blower”. She also said records show the existence of a slave trade route Sierra Leone to Annapolis, plied(定期往来) by British and American ships. "As soon as people stepped on those slave ships in Africa," she said, “whether they were from Benin or whether they were from Sierra Leone, wherever they were from, that identity was lost. Their humanity is stripped from. Who they are as a people has gone.”
The new analysis is part of ongoing research around Belvoir that has given descendants of the people enslaved there new insight into the lives of their ancestors. Speaking to The Post, Nancy Daniels, a genealogist from Laurel, Maryland, who thinks she is a descendant of enslaved families from Belvoir but was not linked to the research on the pipe, called the discovery “overwhelming.” “I'm sitting here about ready to cry,” she said. “I'm sorry. I'm so happy ... Thank God for the DNA.”
This year, events and ceremonies are being held to mark the 400th anniversary of the arrival of the first enslaved people in America, at Jamestown, Virginia, in 1619. Slavery was effectively abandoned in the US on 1 January 1863, with the issue by Abraham Lincoln of the Emancipation Proclamation. It formally ended in December 1865, after the civil war, with the approval of the 13th amendment(修正案).
1.What does the phrase “a mind-blower” in paragraphs 1 and 4 refer to?
A.A surprise B.A confusion
C.An excitement D.A fascination
2.According to Hannes Schroeder, the pipe stem was of great significance because________.
A.it was the first direct evidence that slaves living in Maryland were originally from Africa.
B.it helped the archaeologists to draw a portrait of the enslaved woman.
C.it might contribute to identifying the birthplace of the descendant communities.
D.it contained genic clues to the ancestral background of its owner.
3.What can be inferred from the passage?
A.The owner of the pipe once lived in what is now an area in west Africa.
B.The history of slavery in America is an ongoing topic of concern.
C.African slaves lost their identities when they arrived at the Belvoir plantation.
D.Nancy Daniels, a genealogist was sorry for not being involved in the research.
4.Which of the following is the best title for the passage?
A.DNA from an old pipe throws lights on the origins of the enslaved
B.A new research reveals the origins of enslaved African woman
C.The descendants of enslaved people seek their identities
D.DNA contributes to the breakthrough of a new research
高三英语阅读理解困难题查看答案及解析
As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.
A.exposure | B.distribution | C.expansion | D.emission |
高三英语单项填空简单题查看答案及解析
Answer the following questions by using the information taken from a dictionary page.(You may read the questions first.)
jaguar: n.a type of large, yellow-colored cat with black markings found in the southwestern region of the U.S.and in Central and South America.
jargon: 1.n.an unknown language that seems strange or impossible to understand.2.n.a language made up of two or more other languages: His jargon was a mixture of French and English- 3.n. the special vocabulary of a field or profession: Her report on computers was filled with jargon.4.n.speech that doesn't make sense.
jaunt: 1.n.a trip taken for fun.2.v.to go on a brief pleasant trip: We jaunted to the country last
Saturday.javelin: 1.n.a spear most commonly used as weapon or in hunting.2.n.the contest in which a javelin is thrown.3.n.a lightweight metal or wooden spear that is thrown in track-and-field contests.4, v.to strike, as with ajavelin.
jazz: 1.n.a type of music that originated in New Orleans and is characterized by rhythmic eats.2.n.popular dance music influenced by jazz..3.n.slang empty talk.4.ad.of or like jazz: a jazz band, jazz records.
Jennet; n.a small Spanish horse.
1.Which meaning of the word javelin is used in the sentence below?
At the competition, Jack drew his arm back and threw the javelin 50 yards.
A.Definition 1 B.Definition 2 C.Definition 3 D.Definition 4
2.Which meaning of the word jargon is used in the sentence below?
Doctors often speak in medical jargon.
A.Definition 1 B.Definition 2
C.Definition 3 D.Definition 4
3.What does the word jazz mean in the following sentence?
Don t give me that jazz, for lam a practical person.
A.nonsense B.a kind of dance
C.a type of music D.rhythmic beats
高三英语阅读理解中等难度题查看答案及解析
阅读填空
The“selfie”is used to describe the self-taken photo,often from a smartphone.Someone takes about 10 selfies each time he does,and he only ends up1.(post)one or two of those.He picks the one that he feels make him look the2.(good).In that picture,he gains confidence.For that moment,everything bad or terrible that has happened to him3.(remove),because that smile is what gives him the4.(determine)to love himself.
I read5._poem recently and the young man said,“If I ask you6._you love,the answers will most likely roll off your tongue.You love to read. You love to write.You love your mom,you daughter,or your best friend. How long do you think you can go on and on before you say ‘I love7.(I)’?”
That statement hit me like a ton of bricks.I’ve struggled with confidence all my life.I still do.And in8.way am I saying that taking a selfie is a gateway9.confidence.10.,the selfie does deserve some credit for allowing individuals to express themselves.
高三英语填空题中等难度题查看答案及解析
第二节(共10小题;每小题1.5分,满分15分)
The “selfie” is used to describe the self-taken photo, often from a smartphone. Someone takes about 10 selfies each time he does, and he only ends up 1. ( post) one or two of those. He picks the one that he feels make him look the 2. ( good). In that picture, he gains confidence. For that moment, everything bad or terrible that has happened to him 3. ( remove), because that smile is what gives him the 4. ( determine) to love himself.
I read 5. poem recently and the young man said, “If I ask you 6. you love, the answers will most likely roll off your tongue. You love to read. You love to write. You love your mom, you daughter, or your best friend. How long do you think you can go on and on before you say ‘I love 7. (I)’?”
That statement hit me like a ton of bricks. I’ve struggled with confidence all my life. I still do. And in 8. way am I saying that taking a selfie is a gateway 9. confidence. 10. , the selfie does deserve some credit for allowing individuals to express themselves.
高三英语其他题中等难度题查看答案及解析
阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
The“selfie”is used to describe the self-taken photo,often from a smartphone.Someone takes about 10 selfies each time he does,and he only ends up___1.___(post)one or two of those.He picks the one that he feels make him look the___2.__(good).In that picture,he gains confidence.For that moment,everything bad or terrible that has happened to him___3.__(remove),because that smile is what gives him the___4.___(determine)to love himself.
I read__5.___poem recently and the young man said,“If I ask you__6.____you love,the answers will most likely roll off your tongue.You love to read.You love to write.You love your mom,you daughter,or your best friend.How long do you think you can go on and on before you say ‘I love___7.___(I)’?”
That statement hit me like a ton of bricks.I’ve struggled with confidence all my life.I still do.And in__8.___way am I saying that taking a selfie is a gateway___9.__confidence. __10.___,the selfie does deserve some credit for allowing individuals to express themselves.
高三英语语法填空中等难度题查看答案及解析
Using modern technology, archaeologists (考古学家) have recently discovered about 200 Mayan artifacts (玛雅古器) in Mexico, which surprisingly, appear to have been untouched for up to 1,000 years. The artifacts were found inside a cave in ruins of the ancient Mayan city of Chichen Itza on Mexico’s Yucatan Peninsula.
The lead researcher on the project is Mexican archaeologist Guillermo de Anda. He called the cave a “scientific treasure”.
The findings included bone pieces and burnt offering materials. In addition, incense burners, vases, plates and other objects were discovered. Some items included the portrait of Tlaloc, the rain god of central Mexico.
The cave where the objects were found is so unique. It is part of a cave system known as Balamku. The cave is long, narrow and dark. It is about three kilometers east of the main pyramid of Kukulkan. It sits at the center of Chichen Itza which is the stone city described by the United Nations as “one of the greatest Mayan centers of the Yucatan Peninsula.”
The cave sits about 24 meters underground, with areas connected by passages. Some of the passages were so narrow that researchers had to climb in or pull themselves through. The team has so far explored about 460 meters of the cave, and is unsure how far it stretches. The team plans to continue exploring the cave. The found artifacts will not be removed, but studied inside.
The team accidentally found the artifacts while exploring Chichen Itza in an effort to learn more about its underground water system. The new discovery will help scientists better understand the history, culture, lives and beliefs of people who lived in Chichen Itza, especially in the boom years.
Archaeologists believe there may be another cave hidden under the pyramid of Kukulkan that could be connected to the latest find. “Let’s hope God will lead us there,” Guillermo de Anda said. “That is part of the reason why we are entering these sites to find a connection to the natural well under the Kukulkan.”
1.What’s amazing about the Mayan artifacts discovered in Mexico?
A.The long history and perfect state.
B.The digging time and location.
C.The current high price.
D.The variety of usage.
2.What is paragraph 4 mainly about?
A.The features of the cave. B.The findings in the cave.
C.The ancient cave system. D.The origin of Mayan centers.
3.What is the significance of the new discovery?
A.It can help scientists register cultural relics.
B.It can encourage archaeologists to form work beliefs.
C.It can help scientists further learn about Mayan civilization.
D.It can arouse the interest of Mexicans in archaeology.
4.What will archaeologists do next according to the last paragraph?
A.Dig wells under the Kukulkan.
B.Move the findings to another cave.
C.Find the cause of groundwater disappearance.
D.Try to find another cave under the pyramid of Kukulkan.
高三英语阅读理解中等难度题查看答案及解析
Surgeons in Spain have successfully carried out the world’s first organ transplant using new stem cell technology. Some people are calling it the greatest medical breakthrough so far this century.
But what are stem cells? As we know, most cells in our bodies are designed to serve specific purposes – for example, a liver cell develops to work in the liver and cannot become a heart cell. But stem cells are different. They are very young, and in the laboratory scientists can grow them into different types of cell.
Claudia Castillo needed a new windpipe after getting a serious disease. Scientists from the University of Bristol in the UK took a donor windpipe, or trachea, from someone who had recently died. They used strong chemicals to remove the donor’s cells, leaving a tissue scaffold(组织支架). This was refilled with cells from Ms Castillo’s windpipe, and stem cells from her bone. After four days the cells had grown sufficiently for the windpipe to be transplanted into Ms Castillo.
Currently, transplant patients have to take drugs for the rest of their lives to prevent their bodies rejecting the new organs. These drugs can have bad side-effects, and do not always prevent rejection. But by using Ms Castillo’s own cells, doctors were able to trick her body into thinking the new windpipe was her own organ. Five months on, Claudia Castillo is in perfect health.
This ground-breaking procedure could be used in other transplant operations in the future. Scientists also believe stem cells might be used to treat Parkinson's disease, Alzheimer's disease, heart disease, stroke, arthritis, diabetes, burns and so on.
However, stem cell research is extremely controversial. The most effective stem cells do not come from adults but from embryos created in laboratories and which are just a few days old. Many people have religious or ethical objections to growing embryos, even if they can be used to cure diseases.
1.This transplant is considered the greatest medical breakthrough because _________.
A.this is the first organ transplant in the whole world
B.the patient is in perfect health after the operation
C.it is the first success with new stem cell technology
D.the stem cells are from an embryo developed in a lab
2.Stem cells are different from the other ceils in the way that __________.
A.they are grown in the lab only
B.they can grow into different types of cell
C.they are designed for a specific purpose
D.they can work in the liver not in the heart
3.What is the main idea of the third paragraph?
A.How Claudia survived in the operation
B.How to remove the cells from the donor’s organ
C.Why stem cells are needed in the transplant
D.How the windpipe is transplanted
4.Which of the following is TRUE according to the passage?
A.Human bodies always reject transplanted organs even with their own cells
B.The donor’s cells had to be removed because they were unhealthy
C.The transplanted organ was refilled with the stem cells only
D.Claudia will not have to take drugs to prevent rejection.
5.Which word can best describe the scientists’ attitude towards the stem cell technology?
A.controversial B.confident
C.conservative (保守的) D.critical
高三英语阅读理解中等难度题查看答案及解析
Today, the biggest killers stem as much from our lifestyles as from bacteria and viruses. One of the worst of these is heart disease, and specifically high blood pressure. It’s a slow, but efficient killer that robs many people of what should be the last 10, 20 or 30 years of their lives.
Scientists are claiming that they have now separated unusual ingredients in a rare seaweed discovered by fishermen off the coast of Korea that offer incredible health benefits—including the ability to restore blood pressure to normal levels.
Dr. Haengwoo Lee, a famous biochemist conducted a clinical study on these two ingredients. The first is Seanol, an extremely rare seaweed extract(浓缩物) from Ecklonia Cava that's proven to be 100 times more powerful than any land-based antioxidant(抗氧化剂). That's because it stays working in your body for 12 hours, compared to land-based antioxidants that work for 30 minutes. "Its secret is its make-up of special chemicals that are a huge 40% fat soluble( 可溶的)," Dr. Lee explains. "Unlike nearly all land-based antioxidants that are water soluble, Seanol's protective compounds can get into things like the fatty tissues of your brain and penetrate(渗透) all three layers of your cells, including the outside, the oil-based cell membranes(细胞膜), and your DNA." Indeed, Seanol is so powerful, it's the only FDA-approved Ecklonia Cava marine-algae (海藻) extract in existence.
The second ingredient is Calamarine, a deep-sea omega-3 discovery that delivers 85% more DHA omega-3s to your heart, brain, joints, and eyes. It's known to reduce the problems from tiredness and poor memory, joint pain, mood swings and depression.
With that research in mind, Dr. Lee combined Seanol and Calamarine with a high dose of vitamin D to form Marine-D3, the newest supplement in the fight against age-related illnesses and high blood pressure.
Dr. Lee found that Calamarine delivers some of the greatest concentration of omega-3s known to science. Combined with Seanol's ability to reduce body inflammation(炎症), as well as help cells get the nutrients they need to thrive, stay healthy and protected, Marine-D3 is able to boost a body's entire well being.
The makers of Marine-D3 are so confident that you'll see fast dramatic results from this product, that if you aren't happy after two full months, simply return the unused portion and they'll buy it back. They'll even give you ten dollars extra just for giving it an honest try! That kind of faith, combined with Dr. Lee's exhaustive research, shows that Marine-D3 really is a one-of-a-kind product.
1.From the first paragraph we can infer that ________.
A. Our lifestyles result from the biggest killers
B. our lifestyles do less harm to our bodies than bacteria and viruses do.
C. High blood pressure left untreated may cause shorter life.
D. Heart disease is incurable.
2.What can we know from paragraph 2 ?
A. Fishermen off the coast of Korea have isolated unusual ingredients.
B. Scientists have purified ingredients that can lower blood pressure to normal standard.
C. Scientists discovered a rare seaweed.
D. Scientists have imagined a medicine that treat blood pressure.
3.Which is right about Seanol ?
A. According to FDA , Seanol reaches the agreed standard.
B. Seanol can be fat soluble entirely.
C. Seanol is a common seaweed extract from Ecklonia Cava .
D. Seanol's protective compounds can get into all things like the fatty tissues of your brain.
4.What do we know about Calamarine?
A. Calamarine is easy to find in the surface of the sea.
B. Calamarine 's ability to reduce body inflammation(炎症) alone.
C. Calamarine has a low dose of vitamin D and C.
D. Calamarine may relieve you if you feel blue.
5.What’s the makers’ attitude toward Marine-D3?
A. pessimistic B. indifferent C. doubtful D. Optimistic
高三英语阅读理解中等难度题查看答案及解析