(2013·四川省宜宾五校二调)A recent study has ________ an unexpected conclusion that the African elephant should be divided into two different species.
A．kept up with B．made up with
C．caught up with D．come up with
高三英语单项填空简单题
(2013·四川省宜宾五校二调)A recent study has ________ an unexpected conclusion that the African elephant should be divided into two different species.
A．kept up with B．made up with
C．caught up with D．come up with
高三英语单项填空简单题查看答案及解析
A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
A．kept up with B．made up with C．caught up with D.come up with
高三英语单项填空中等难度题查看答案及解析
(2014·安徽省芜湖三校一模)A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
A．kept up with B．made up with
C．caught up with D．come up with
高三英语单项填空简单题查看答案及解析
A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct (不同的) species
The discovery was made by researchers at York and Harvard universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modern elephants—the Asian elephant, African forest elephant and African savanna elephant
Once they obtained DNA sequences (序列) from two fossils (化石)，mammoths and mastodons， the team compared them with DNA from modern elephants. They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths.
The scientists used detailed genetic analysis to prove that the African savanna elephants and the African forest elephants have been distinct species for several million years. The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths. This result amazed all the scientists.
There has long been debate in the scientific community that the two might be separate species but this is the most convincing scientific evidence so far that they are indeed different species.
Previously, many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species despite the elephants’ significant size differences. The savanna elephant has an average shoulder height of 3.5metres while the forest elephant has an average shoulder height of 2.5metres. The savanna elephant weighs between six and seven tons, roughly double the weight of the forest elephant. But the fact that they look so different does not necessarily mean they are different species. However, the proof lay in the analysis of the DNA.
Alfred Roca, assistant professor in the department of Animal Sciences at the University of Minois, said, “We now have to treat the forest and savanna elephants as two different units for conservation purpose. Since 1950 all African elephants have been conserved as one species. Now that we know the forest and savanna elephants are two very distinct animals, the forest elephant should become a bigger priority (优先)for conservation purpose .”
1.One of the fossils studied by the researchers is that of ________.
A. the Asian elephant B. the forest elephant
C. the savanna elephant D. the mastodon elephant
2.The underlined word “divergence” in paragraph 4means “________”
A. evolution B. exhibition C. separation D. examination
3.The researcher’s conclusion was based on a study of the African elephant’s _____
A. DNA B. height C. weight D. population
4.What were Alfred Roca’s words mainly about?
A. The conservation of African elephants.
B. The purpose of studying African elephants
C. The way to divide African elephants into two units
D. The reason for the distinction of African elephants
5.Which of the following can be the best title for the passage?
A. Naturalist’s Belief about Elephants.
B. Amazing Experiment about Elephants
C. An Unexpected Finding about Elephants
D. A Long scientific Debate about Elephants
高三英语阅读理解中等难度题查看答案及解析
A recent study of ancient and modern elephants has come up with the unexpected conclusion that the African elephant is divided into two distinct (不同的) species
The discovery was made by researchers at York and Harvard universities when they were examining the genetic relationship between the ancient woolly mammoth and mastodon to modern elephants—the Asian elephant, African forest elephant and African savanna elephant
Once they obtained DNA sequences (序列) from two fossils (化石)，mammoths and mastodons the team compared them with DNA from modern elephants. They found to their amazement that modern forest and savanna elephants are as distinct from each other as Asian elephants and mammoths.
The scientists used detailed genetic analysis to prove that the African savanna elephants and the African forest elephants have been distinct species for several million years. The divergence of the two species took place around the time of the divergence of Asian elephants and woolly mammoths. This result amazed all the scientists.
There has long been debate in the scientific community that the two might be separate species but this is the most convincing scientific evidence so far that they are indeed different species.
Previously, many naturalists believed that African savanna elephants and African forest elephants were two populations of the same species despite the elephants’ significant size differences. The savanna elephant has an average shoulder height of 3.5metres while the forest elephant has an average shoulder height of 2.5metres. The savanna elephant weighs between six and seven tons, roughly double the weight of the forest elephant. But the fact that they look so different does not necessarily mean they are different species. However, the proof lay in the analysis of the DNA.
Alfred Roca, assistant professor in the department of Animal Sciences at the University of Minois, said, “We now have to treat the forest and savanna elephants as two different units for conservation purpose. Since 1950 all African elephants have been conserved as one species. Now that we know the forest and savanna elephants are two very distinct animals, the forest elephant should become a bigger priority (优先)for conservation purpose .”
1.
One of the fossils studied by the researchers is that of ________.
A. the Asian elephant B. the forest elephant
C. the savanna elephant D. the mastodon elephant
2.
The underlined word “divergence” in paragraph 4means “________”
A. evolution B. exhibition C. separation D. examination
3.
The researcher’s conclusion was based on a study of the African elephant’s ____________
A. DNA B. height C. weight D. population
4.
What were Alfred Roca’s words mainly about?
A. The conversation of African elephants.
B. The purpose of studying African elephants
C. The way to divide African elephants into two units
D. The reason for the distinction of African elephants
5.
Which of the following can be the best title for the passage?
A. Naturalist’s Belief about Elephants. B. Amazing Experiment about Elephants
C. An Unexpected Finding about Elephants D. A Long scientific Debate about Elephants
高三英语阅读理解中等难度题查看答案及解析
A recent study has come up with _____ unexpected conclusion that ____ Africa elephants should be divided into two different species.
A．a, the B．an, the C．an, an D．the, the
高三英语单项填空中等难度题查看答案及解析
A recent study has come up with _____ unexpected conclusion that ____ Africa elephants should be divided into two different species.
A.a, the B. an, the C. an, an D. the, the
高三英语单项填空简单题查看答案及解析
(2013·安徽省芜湖三校一模)A recent study has found that the number of smokers ________ sharply over the past five years.
A．is increasing
B．are increasing
C．has been increasing
D．have been increasing
高三英语单项填空中等难度题查看答案及解析
(2013·高考四川卷，E)Fear may be felt in the heart as well as in the head，according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.
Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their hearts are contracting(收缩) and pumping blood around their bodies，compared with the point when the heartbeat is relaxed.Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event，depending on which point it is at in its regular cycle of contraction and relaxation.
Sarah Garfinkel at the Brighton and Sussex Medical School said：“Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart.”
The study tested 20 healthy volunteers on their reactions to fear as they were shown pictures of fearful faces.Dr Garfinkel said，“The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed.Thus our hearts can also affect what we see and what we don’t see－and guide whether we see fear.”
To further understand this relationship，the scientists also used a brain scanner(扫描仪) to show how the brain influences the way the heart changes a person’s feeling of fear.
“We have found an important mechanism by which the heart and brain ‘speak’to each other to change our feelings and reduce fear，”Dr Garfinkel said.
“We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced，we may be able to develop more successful treatments for anxiety disorders，and also for those who may be suffering from serious stress disorder.”
1.What is the finding of the study?
A．One’s heart affects how he feels fear.
B．Fear is a result of one’s relaxed heartbeat.
C．Fear has something to do with one’s health.
D．One’s fast heartbeats are likely to cause fear.
2.The study was carried out by analyzing________.
A．volunteers’ heartbeats when they saw terrible pictures
B．the time volunteers saw fearful pictures and their health conditions
C．volunteers’ reactions to horrible pictures and data from their brain scans
D．different pictures shown to volunteers and their heartbrain communication
3.Which of the following is closest in meaning to“mechanism” in Paragraph 6?
A．Order. B．System.
C．Machine. D．Treatment.
4.This study may contribute to________.
A．treating anxiety and stress better
B．explaining the cycle of fear and anxiety
C．finding the key to the heartbrain communication
D．understanding different fears in our hearts and heads
高三英语阅读理解中等难度题查看答案及解析
In a 2013 study, it was reported that almost 66 percent of recent high school graduates went to college, a 4 percent decline since 2009, when college enrollment(入学) reached an all-time high.
So, what are the other 35 percent of high school graduates doing after they walk out of their school for the last time? Here are what some Robinson High students have planned.
For Robbie Claiborne, graduation means the start of a military career.He plans to join the Coast Guard after graduation."I was born around the ocean.I love the water.I want to fight for my country and for what I love," said Claiborne.
Others just want a break from school."I really want to take a gap year," Liliam Clavijo said."I'd really love to work in Spain for a year before going to college."
Most students, however, are rather excited.Eban Trunk, a junior, has been planning his future career since middle school."I really want to be a mailman.It just seems like a cool job.Everyone loves the mailman," Trunk said."One day the idea just came to me, and I knew that was what I wanted to do."
For many students, a high school diploma means more choices."I'm not really sure what I'll do after high school," senior Joshua Loring said."I might do technical school.I'm in auto shop classes right now."
Meanwhile, Cassidy Grunderson plans on working at Busch Gardens full time."I just want to live on my own, get a job and move out," Grunderson said.
Stephen Hambleton, who teaches auto tech classes at Robinson, says many of his students choose to enter the automobile industry after graduation."It's an instant job, and after taking years of auto shop in high school, it's easy to get hired," he said.Several seniors in his class, including Loring, plan to enter the industry upon graduation.
"College isn't for everyone, and I really respect people who decide to do their own thing," said Coleman Parks, a senior student."I think too many people feel that they're only as valuable as their degree."
Graduates are proving that college isn't the only option when high school ends.
1.What can we learn from the study in 2013?
A.College enrollment in 2013 reached the highest point in history.
B.College enrollment in 2013 is not as high as that in 2009.
C.Only a small number of graduates go to college after graduation.
D.Some students fail to graduate from senior high school.
2.What is the meaning of the underlined phrase “a gap year”?
A.a year of differences
B.a year of many choices.
C a year between senior high graduation and college.
D.a year between college graduation and workplace.
3. According to the passage, which of the following is TRUE?
A.Cassidy Grunderson plans to enter the automobile industry upon graduation
B.For many students, a high school diploma gives them limited choices.
C.Senior high school graduates are faced with more choices than just going to college.
D.Eban Trunk plans to work in Spain for a year.
4.What might be the best title for the story?
A.Fewer Senior High Graduates Go to College
B.Cool Jobs for Senior High Graduates
C.Gap Year or College?
D.Confused Senior High Graduates
高三英语阅读理解中等难度题查看答案及解析