For almost 500 years, people have wondered what deadly disease wiped out most of the Aztecs (阿芝特克人）. The locals called it cocolizthi, and now a team of scientists think they know exactly what that was. The outbreak is considered to be one of the deadliest epidemics (传染病）in human history. For centuries, its cause has been debated by historians. New evidence suggests that the Aztecs died from a type of bacteria called salmonella enterica.
An international team of scientists came to this conclusion after analysing the skeletons (骨骼) of 29 Aztecs buried in a cocoliztli cemetery in the Oaxaca region of Mexico. The scientists obtained samples from the teeth of ten of the skeletons. They compared these with their database of bacteria and found traces of salmonella enterica.
Salmonella enterica can cause enteric fever, of which typhoid (伤寒）is a type. Today, there are around 21 million cases of typhoid worldwide and it is considered a global threat.
The Aztecs were fierce hunter-gatherers who settled in what is now Mexico at the beginning of the 13th century. From their incredible capital city Tenochtitlan(now Mexico City),the Aztecs fought wars with other tribes until they ruled much of the region.
The Aztecs ended up controlling large parts of Mesoamerica--now much of Mexico and Central America--until Spanish explorers arrived in 1519 and brought with them advanced weapons and deadly diseases. The team believe that the domesticated animals, such as goats and horses, which the explorers brought with them carried the deadly bacteria.
By 1545,not even 30 years after the Spanish had arrived, Mexico's Aztec nation started coming down with a terrible illness. Symptoms included high fever, headaches and bleeding from the eyes, nose and mouth. Within five years, up to 15 million people---more than 80%of the population at the time--had died from the mystery illness they called cocoliztli. The Aztec people had no immunity (免疫) to fight the disease.
“We cannot say with certainty that salmonella enterica was the cause of the cocolizti epidemic,” said Kirsten Bos from the Max Planck Institute for the Science of Human History in Germany.” We do believe that it should be considered a strong candidate."
1.Which helped the scientists come to the conclusion.
A.Certain traces of deadly diseases carried by goats and horses
B.Extensive comparison of Aztecs buried in a cocoliztli cemetery
C.Definite discoveries of infected tooth samples from the database
D.Small amounts of certain bacteria in the teeth of the skeletons
2.Which of the following is TRUE about the Aztecs?
A.They had a population of about 15 million around 1545.
B.Their livelihood depended on raising domesticated animals.
C.Their population dropped sharply in the middle 16th century.
D.They won the wars with the Spanish despite being poorly equipped.
3.The underlined word “it” in the last paragraph refers to_
A.cocolizti epidemic B.salmonella enterica C.the typhoid D.the Max Planck Institute
4.The passage is mainly about
A.how the Aztecs got infected with salmonella enterica
B.why the Aztecs had no immunity to fight typhoid
C.which reason caused the Aztecs to abandon their native land
D.what led to the military and economic decline of the Aztecs
高三英语阅读理解中等难度题
For almost 500 years, people have wondered what deadly disease wiped out most of the Aztecs (阿芝特克人）. The locals called it cocolizthi, and now a team of scientists think they know exactly what that was. The outbreak is considered to be one of the deadliest epidemics (传染病）in human history. For centuries, its cause has been debated by historians. New evidence suggests that the Aztecs died from a type of bacteria called salmonella enterica.
An international team of scientists came to this conclusion after analysing the skeletons (骨骼) of 29 Aztecs buried in a cocoliztli cemetery in the Oaxaca region of Mexico. The scientists obtained samples from the teeth of ten of the skeletons. They compared these with their database of bacteria and found traces of salmonella enterica.
Salmonella enterica can cause enteric fever, of which typhoid (伤寒）is a type. Today, there are around 21 million cases of typhoid worldwide and it is considered a global threat.
The Aztecs were fierce hunter-gatherers who settled in what is now Mexico at the beginning of the 13th century. From their incredible capital city Tenochtitlan(now Mexico City),the Aztecs fought wars with other tribes until they ruled much of the region.
The Aztecs ended up controlling large parts of Mesoamerica--now much of Mexico and Central America--until Spanish explorers arrived in 1519 and brought with them advanced weapons and deadly diseases. The team believe that the domesticated animals, such as goats and horses, which the explorers brought with them carried the deadly bacteria.
By 1545,not even 30 years after the Spanish had arrived, Mexico's Aztec nation started coming down with a terrible illness. Symptoms included high fever, headaches and bleeding from the eyes, nose and mouth. Within five years, up to 15 million people---more than 80%of the population at the time--had died from the mystery illness they called cocoliztli. The Aztec people had no immunity (免疫) to fight the disease.
“We cannot say with certainty that salmonella enterica was the cause of the cocolizti epidemic,” said Kirsten Bos from the Max Planck Institute for the Science of Human History in Germany.” We do believe that it should be considered a strong candidate."
1.Which helped the scientists come to the conclusion.
A.Certain traces of deadly diseases carried by goats and horses
B.Extensive comparison of Aztecs buried in a cocoliztli cemetery
C.Definite discoveries of infected tooth samples from the database
D.Small amounts of certain bacteria in the teeth of the skeletons
2.Which of the following is TRUE about the Aztecs?
A.They had a population of about 15 million around 1545.
B.Their livelihood depended on raising domesticated animals.
C.Their population dropped sharply in the middle 16th century.
D.They won the wars with the Spanish despite being poorly equipped.
3.The underlined word “it” in the last paragraph refers to_
A.cocolizti epidemic B.salmonella enterica C.the typhoid D.the Max Planck Institute
4.The passage is mainly about
A.how the Aztecs got infected with salmonella enterica
B.why the Aztecs had no immunity to fight typhoid
C.which reason caused the Aztecs to abandon their native land
D.what led to the military and economic decline of the Aztecs
高三英语阅读理解中等难度题查看答案及解析
People _______ about what our future will look like for thousands of years .
A.have been wondering B.wonder C.wondered D.will wonder
高三英语单项填空中等难度题查看答案及解析
For years and years people have been saying that the railways are dead. “ We can do without railways.” People say…as if motorcars and planes have made the railways unnecessary. We all keep hearing that trains are slow, that they lose money, and that they’re dying .But this is far from the truth: in these days of expensive oil, the railways have become highly competitive with motorcars and planes. If you want to carry people or goods from place to place, they are cheaper than planes. And they have much in common with planes. A plane goes in a straight line and so does a railway. What is more, it takes you from the heart of a city into the heart of another. It doesn’t leave you up as a plane does, miles and miles from the city center. It doesn’t hold you up as a car does, in endless traffic jams, and a single train carry goods which a plane or a motorcar could never do.
Far from being dead, the railways are very much alive. Modern railway lines give you a smooth, untroubled journey. Where else can you eat well, sleep in comfort, feel safe and enjoy the scene while you are traveling at speed at the same time? And we are only at the beginning, for we have just entered the age of super-fast trains, trains traveling at 150 miles an hour and more. Soon we will be wondering why we spent so much on motorcars we can’t use because we have not enough money to buy the oil and planes we can’t fly for the same reason..
1.Some people think the railways are unnecessary for many reasons except that________.
A．planes and motorcars have taken the place of trains
B．oil is expensive today
C．trains are slow
D．railways lose money
2.According to the writer, which of the following is Not true?
A．It is cheaper to travel by train than by plane.
B．The railway station is usually at the center of the city.
C．When you get off the plane you will find yourself right in the city center.
D．No motorcar or plane can carry as many goods as a train does.
3.The writer thinks that the railways, far from being dead, are very much alive because________.
A．we can have a smooth and untroubled journey
B．we’ll not have enough money to fly in planes
C．we can now travel in super-fast train
D．all of the above
4.The best title for this passage may be”________”
A．Not the End but the Beginning
B．Which is the Best: Train, Motorcar or Plane
C．Trains are More Competitive than Motorcars or Planes
D．Oh, Super-fast Trains
高三英语阅读理解中等难度题查看答案及解析
A: For years some people have been saying that railways are dead. They say, “Trains are slow, and they lose money. Motorcars and planes have made them unnecessary.”
B: 1. . I think in these days of expensive oil, railways have become highly competitive with motorcars and planes.
A: Right. If you want to carry people or goods from place to place, they are much cheaper than planes.
B: 2. . A plane goes in a straight line, and so does a railway.
A: What is more, it takes you from the heart of a city into the heart of another. 3. . Nor does it hold you up as a car does in heavy traffic.
B: 4. . Modern railway lines give you a smooth, untroubled journey. We’ve just entered the age of super-fast trains, traveling at 160 miles an hour and more.
A：5.
A. So railways will have very bright future, I dare say.
B. It doesn’t leave you as a plane does, miles and miles from the city center.
C. Far from being dead, railways are developing very quickly.
D. Trains are really slower than planes.
E. And they have much in common with planes.
F. But it is far from the truth.
G. Trains are really more comfortable than planes.
高三英语其他题中等难度题查看答案及解析
Summer is a busy time for travel. For years, people have wondered whether they are safe from viruses when they travel in small, enclosed areas. They worry about close contact with others who may be sick.
The current spread of a swine flu(猪流感) virus has added to these concerns. Recently, the World Health Organization raised its warning about the new H1N1 virus to its highest level. W.H.O. Director-General Margaret Chan declared the sickness a pandemic–a disease that has spread to many nations. Given this information, many people want to know how safe it is to travel?
The answers people are getting may seem conflicting. For example, a W.H.O. statement urged nations not to close their borders or limit trade and travel. Director-General Chan said cases are generally not that serious for most people. Still, W.H.O. officials continue to report new cases across the world.
In the past, the W.H.O. and experts noted guidance for disease spread on airplanes. The experts said you could get infected only if you sit within two rows of someone who is sick. That would be a distance of up to three meters from the sick person. And this was true only if you sat there for more than eight hours.
But a travel-health expert says this guidance may not be helpful for swine flu. He suggests steps that could help prevent getting swine flu on an airplane. His advice includes keeping the airflow over your seat on the “low” position. The doctor says you should point the equipment so the flow of air is just in front of your face.
Doctors say anyone with pain, swelling(肿胀) or red skin on a leg during or after a long trip may have a blood clot(凝块). Anyone with such signs should see a doctor as soon as possible. The condition many times can be treated with drugs that thin the blood and stop the clot from moving through the body.
68．The underlined word “conflicting” is closest in meaning to ________.
A. in disagreement B. not true C. the same D. unbelievable
69．According to Director-General Chan, the swine flu is ________.
A. a disease spread on airplanes B. a very dangerous disease
C. a disease requiring limit travel D. a widely spread disease
70．Which of the following is the travel-health expert’s opinion on traveling in an airplane?
A. It’s safe to sit within two rows of a sick person.
B. It’s helpful to keep air flowing right before your face.
C. It’s important for a passenger to stay in a plane within 8 hours.
D. It’s certain that a passenger will have a blood clot after a long flight.
71．What would be the best title for the text?
A. Stop Traveling in Case of Swine Flu B. Experts’ Arguments Over Swine Flu
C. Prevention of Swine Flu on the Trip D. No News Is the Best News
高三英语阅读理解简单题查看答案及解析
Summer is a busy time for travel. For years, people have wondered whether they are safe from viruses when they travel in small, enclosed areas. They worry about close contact with others who may be sick.
The current spread of a swine flu(猪流感) virus has added to these concerns. Recently, the World Health Organization raised its warning about the new H1N1 virus to its highest level. W.H.O. Director-General Margaret Chan declared the sickness a pandemic–a disease that has spread to many nations. Given this information, many people want to know how safe it is to travel?
The answers people are getting may seem conflicting. For example, a W.H.O. statement urged nations not to close their borders or limit trade and travel. Director-General Chan said cases are generally not that serious for most people. Still, W.H.O. officials continue to report new cases across the world.
In the past, the W.H.O. and experts noted guidance for disease spread on airplanes. The experts said you could get infected only if you sit within two rows of someone who is sick. That would be a distance of up to three meters from the sick person. And this was true only if you sat there for more than eight hours.
But a travel-health expert says this guidance may not be helpful for swine flu. He suggests steps that could help prevent getting swine flu on an airplane. His advice includes keeping the airflow over your seat on the “low” position. The doctor says you should point the equipment so the flow of air is just in front of your face.
Doctors say anyone with pain, swelling(肿胀) or red skin on a leg during or after a long trip may have a blood clot(凝块). Anyone with such signs should see a doctor as soon as possible. The condition many times can be treated with drugs that thin the blood and stop the clot from moving through the body.
1.The underlined word “conflicting” is closest in meaning to ________.
A. in disagreement B. not true C. the same D. unbelievable
2.According to Director-General Chan, the swine flu is ________.
A. a disease spread on airplanes B. a very dangerous disease
C. a disease requiring limit travel D. a widely spread disease
3.Which of the following is the travel-health expert’s opinion on traveling in an airplane?
A. It’s safe to sit within two rows of a sick person.
B. It’s helpful to keep air flowing right before your face.
C. It’s important for a passenger to stay in a plane within 8 hours.
D. It’s certain that a passenger will have a blood clot after a long flight.
4.What would be the best title for the text?
A. Stop Traveling in Case of Swine Flu B. Experts’ Arguments Over Swine Flu
C. Prevention of Swine Flu on the Trip D. No News Is the Best News
高三英语阅读理解中等难度题查看答案及解析
What is a dream?
For centuries, people have wondered about the strange places that they seem to visit in their sleep. ________1.________However, they have been valued as necessary to a person's health and happiness.
Historically people thought dreams contained messages from God. It was only in the twentieth century that people started to study dreams scientifically believing that they tell about a person's character.________2.________He believed that dreams allow a person to express fantasies or fears, which would be socially unacceptable in real life.
The second theory to become popular was Carl Jung's compensation theory. Jung, a former student of Freud, said that the purpose of a dream is not to hide something, but rather to communicate it to the dreamer. ________3.________Thus, people who think too highly of themselves may dream about falling; those who think too little of themselves dream of being heroes.
Using more recent research, William Domhoff from the University of California found that dreaming is a mental skill that needs time to develop in humans. ,________4.________ Until they reach age five, they can not express very well what their dreams are about. Once people become adults, there is little or no change in their dreams. The dreams of men and women differ. For instance,
The characters that appear in the dreams of men are often other men, and often involve physical aggression.
The meaning of dreams continues to be difficult to understand. ________5.________ If you dream that a loved one is going to die, do not panic. The dream may have meaning, but it does not mean that your loved one is going to die.
A．Dreams make up for what is lacking in waking life.
B．However, people should not take their dreams as reality.
C．They have been considered as meaningless nighttime journeys.
D．It gives scientists chances to better understand human mind.
E．Children do not dream as much as adults.
F．They think their mind is trying to tell them something.
G．First, there was Sigmund Freud’s theory.
高三英语填空题困难题查看答案及解析
Some people ________ not have plans yet for New Year’s Eve, but others know exactly what they will be doing.
高三英语单项填空中等难度题查看答案及解析
Some people ________ not have plans yet for New Year’s Eve, but others know exactly what they will be doing.
A. can B. must C. need D. may
高三英语单项填空中等难度题查看答案及解析
Some people ________ not have plans yet for New Year’s Eve, but others know exactly what they will be doing.
A. can B. must C. need D. may
高三英语单项填空简单题查看答案及解析