Humans and elephants don’t always get along. In Africa and Asia, elephants damage infrastructure (基础设施), farmers’ crops, and natural habitat critical for other species. If an elephant becomes a problem, humans may kill it. So local people and conservationists are trying to find better ways to keep elephants away from sensitive places. Now, researchers think they have a good tool to stop elephants: honeybee pheromones (信息素).
“Elephants hate being stung (刺) in the trunk, so it’s an extremely sensitive organ. Imagine being stung in your nose by a bee, and multiply that a few thousand times.” said Mark Wright, a professor of entomology at the University of Hawaii at Manoa.
Kenyan farmers have long known that if they hang live beehives around their farms, they will repel elephants. “The problem is logistical, how do you manage hundreds of thousands of hives, if you have a huge area to protect? And then the idea came up to look at the alarm pheromones, which are chemicals that the bee release to launch an attack on something that’s damaging the hive.” Because elephants have a highly developed sense of smell, Wright and his team thought they might be able to use the bees’ alarm signal to affect elephant behavior.
So the researchers tested out a synthetic blend (合成混合物) of chemicals that imitates honeybees’ alarm pheromones. In Greater Kruger National Park in South Africa, the team hung white socks treated with the synthetic mixture as well as untreated control socks around an elephant watering hole, and then observed the animals’ behavior. “Elephants are really curious organisms, they’ll walk along and see something like a sock hanging on a branch in the environment, and they’ll inspect it. And if it’s not treated with the alarm pheromones, they’ll pick it up, throw it around, try to taste it, things like that. And in the case of the treated ones, we found that they would show immediate signs of unease or uncertainty, and they’d eventually back off from them. Very seldom would they go to pick them up and play with them.” The study is in the journal Current Biology.
1.What will the researchers do to prevent elephants from damaging human’s habitat?
A.Kill them. B.Scare them away.
C.Apply honeybee pheromones. D.Rebuild a new ecosystem.
2.What does Mr. Wright think of Kenyan farmers’ method if it’s applied to a huge area?
A.Scientific. B.Flexible. C.Awesome. D.Impractical.
3.Why did the researcher conduct the study?
A.To confirm what they thought.
B.To attract the elephants’ attention.
C.To preserve the elephants’ habitat.
D.To test out honeybee’s alarm pheromones.
4.What’s the main idea of the text?
A.Elephants and humans don’t get along well.
B.Honeybee pheromones can keep elephants away.
C.Elephants have a highly developed sense of smell.
D.Honeybees release pheromones to launch attacks.
高三英语阅读理解中等难度题
Humans and elephants don’t always get along. In Africa and Asia, elephants damage infrastructure (基础设施), farmers’ crops, and natural habitat critical for other species. If an elephant becomes a problem, humans may kill it. So local people and conservationists are trying to find better ways to keep elephants away from sensitive places. Now, researchers think they have a good tool to stop elephants: honeybee pheromones (信息素).
“Elephants hate being stung (刺) in the trunk, so it’s an extremely sensitive organ. Imagine being stung in your nose by a bee, and multiply that a few thousand times.” said Mark Wright, a professor of entomology at the University of Hawaii at Manoa.
Kenyan farmers have long known that if they hang live beehives around their farms, they will repel elephants. “The problem is logistical, how do you manage hundreds of thousands of hives, if you have a huge area to protect? And then the idea came up to look at the alarm pheromones, which are chemicals that the bee release to launch an attack on something that’s damaging the hive.” Because elephants have a highly developed sense of smell, Wright and his team thought they might be able to use the bees’ alarm signal to affect elephant behavior.
So the researchers tested out a synthetic blend (合成混合物) of chemicals that imitates honeybees’ alarm pheromones. In Greater Kruger National Park in South Africa, the team hung white socks treated with the synthetic mixture as well as untreated control socks around an elephant watering hole, and then observed the animals’ behavior. “Elephants are really curious organisms, they’ll walk along and see something like a sock hanging on a branch in the environment, and they’ll inspect it. And if it’s not treated with the alarm pheromones, they’ll pick it up, throw it around, try to taste it, things like that. And in the case of the treated ones, we found that they would show immediate signs of unease or uncertainty, and they’d eventually back off from them. Very seldom would they go to pick them up and play with them.” The study is in the journal Current Biology.
1.What will the researchers do to prevent elephants from damaging human’s habitat?
A.Kill them. B.Scare them away.
C.Apply honeybee pheromones. D.Rebuild a new ecosystem.
2.What does Mr. Wright think of Kenyan farmers’ method if it’s applied to a huge area?
A.Scientific. B.Flexible. C.Awesome. D.Impractical.
3.Why did the researcher conduct the study?
A.To confirm what they thought.
B.To attract the elephants’ attention.
C.To preserve the elephants’ habitat.
D.To test out honeybee’s alarm pheromones.
4.What’s the main idea of the text?
A.Elephants and humans don’t get along well.
B.Honeybee pheromones can keep elephants away.
C.Elephants have a highly developed sense of smell.
D.Honeybees release pheromones to launch attacks.
高三英语阅读理解中等难度题查看答案及解析
Most women in our company always the latest fashions.
| A．get along with | B．put up with |
| C．keep up with | D．make up for |
高三英语单项填空简单题查看答案及解析
London—coffee protects mice from radiation and could get the same way in humans, according to Indian scientists.
Scientist at India’s Bhabha Atomic Research Center discovered that mice injected with caffeine (咖啡因)remained alive after high doses(剂量)of normally lethal radiation.
Although the study was limited to animals, Kachadillilli George, head of the research team, believes the findings could have implications (something suggested ) for humans .
“It does suggest that coffee might have some beneficial effects in protecting against radiation,” he told New Scientist magazine late last month.
George and his team injected 471 mice with caffeine and left them uncovered to 7.5 grays of gamma radiation(伽玛射线),enough to kill most mice. But 25 days later 70 percent of the mice that had received 80 milligrams(毫克)of caffeine per kilogram of body weight were still alive.
On the contrary all 196 mice that had been left uncovered to the same radiation but had not been given any caffeine died.
1.George and his team drew the conclusion from________.
A．the magazine B．their invention C．the experiment D．their experience
2.From the news, we know________can be protected from radiation.
A．both mice and humans B．only mice
C．only humans D．neither humans nor mice
3.From paragraph 5, we know 30 percent of the mice died 25 days later. The reason was probably that________.
A．these mice had been given only 80 milligrams of caffeine
B．these mice hadn’t been injected with caffeine
C．these mice were very big and strong
D．these mice hadn’t been given enough caffeine
4.Which is the best title of the article?
A．Human and Mice B．New Radiation Defense—Coffee
C．Deadly Radiation—Gamma Radiation D．Mice Died of Caffeine
5.In paragraph 2,the underlined word “ lethal ”means________.
A．causing death B．lively C．exciting D．rich
高三英语阅读理解中等难度题查看答案及解析
Chinese students always complain that they’re under great pressure and don’t get enough sleep. But they may be surprised to learn that they’re much luckier than their peers (同龄人) in South Korea and Japan, according to a recently published report, conducted by Shanghai Academy of Social Sciences on the physical and mental health of senior high school students in the three Asian countries.
Among nearly 6,000 high school students in the three countries, Chinese students are the tallest but poorest in physical fitness. Chinese students are on average 168.17cm, compared with 167.61cm for South Korean students and 164.70cm for Japanese students. Chinese students asked for sick leave more than students in other countries. About 72 percent of Korean students never asked for sick and injury leave during high school, compared to 53 percent for Japanese students and 45 percent for Chinese students.
As the survey presents, Japanese and South Korean students suffer more pressure. Statistics show 16 percent of students in China said they experienced mental pressure often over the past year, while the numbers in Japan and South Korea were 33 percent and 47 percent respectively. Their worries come from “study”, “friendships” and “relationship with their parents”. To go with stress, 57.9 percent of Korean students sleep the least, less than six hours a day, compared with 46.6 percent of Japanese students and 30 percent of Chinese students.
More Chinese students were satisfied with their physical appearance. In measures of selfworth, such as “I think I am valuable” and “I can complete many things”, “I won’t give up to failure”, Chinese students showed greater selfconfidence than students in Japan and South Korea and they are the happiest among the three.
1.According to the survey, who sleep the most? (No more than 2 words)
_____________________________________________________________________
2.Among the surveyed 6, 000 students, how many Japanese students ever asked for leave? (No more than 3 words)
_____________________________________________________________________
3.Why are Chinese students happier than Korean and Japanese students? (No more than 5 words)
_____________________________________________________________________
4.What’s the passage mainly about? (No more than 18 words)
_____________________________________________________________________
高三英语其他题中等难度题查看答案及解析
In 2013 alone at least 20,000 African elephants were killed for their teeth. In South Africa over the last two years more than 2,200 rhinos were killed for their horns. These numbers are alarming, because current rates of illegal hunting are faster than birth rates, which could lead to extinction for these ecologically important creatures in their environment. Indeed, some elephant and rhino populations are on track to be locally extinct within the next decade.
If you are reading this, you may already be aware of these facts. But you might not know that wildlife trafficking (走私) not only threatens the existence of elephants and rhinos but is also leading to extinction of other species, such as tigers, tortoises, sea turtles—and the world’s most trafficked mammal—pangolins (穿山甲).
Pangolins are the only mammals that are entirely covered in tough scales (鳞)，which makes them look very strong. But actually they are endangered mammals. There are eight different species of pangolins, four in Asia and four in Africa, and all are threatened with extinction. Although pangolins are protected throughout most of the countries where they live, high demand in East Asia, where the delicious pangolin meat is considered a delicacy and where their scales are used in traditional medicines, is driving an illegal trade in both live animals and pangolin parts. The number of pangolin trafficking is shocking. Experts believe that over the last 10 years more than 1 million pangolins were taken from the wild. It is estimated that between 40,000 and 81,250 pangolins were killed for the illegal trade in 2013 alone.
In February, the United States released a plan to deal with wildlife trafficking, which lays out the steps we will take to fight the illegal trade in wildlife, including pangolins. We are strengthening the carrying out of the plan; building international cooperation and contribution to protect wildlife; raising awareness to drive down the demand that is fueling the illegal trade.
Get involved and remember World Wildlife Day (March 3) by spreading the plan. Use social media and tell everyone that now is the time to get serious about wildlife crime and end the demand that threatens species, big and small, from the huge elephant to the shy pangolin.
1.How many endangered creatures are mentioned in the passage?
A. 4. B. 5.
C. 6. D. 7.
2.Which of the following is TRUE according to Paragraph 3?
A. Eight species of pangolins live on the same continent.
B. Pangolins are not protected in most of their natural habitats.
C. The scales of pangolins can be used as an ingredient for cooking.
D. High demand contributes to the illegal trade of pangolins in East Asia.
3.What can we know about the plan released by the US?
A. Social media will be used to spread World Wildlife Day.
B. Whether the plan will be worked out remains to be seen.
C. The demand leading to the illegal trade in East Asia is to be brought down.
D. The US will work together with other countries to protect wildlife.
4.What is the author’s intention of writing the passage?
A. To inform us something about World Wildlife Day.
B. To raise awareness of protecting endangered wildlife.
C. To explain why pangolins are illegally traded in East Asia.
D. To show how the United States is to fight the illegal trade in wildlife.
高三英语阅读理解中等难度题查看答案及解析
The lions and leopards(豹) of a national park in India normally do not get along. They_______each other for space and food. But about a year ago, a young lioness in the park _______ a baby leopard.
The 2-month-old baby with brown ears and blue eyes was_______,and the lioness spent weeks nursing,_______ and caring for him until he died. She treated him as if he were one of her own two sons, who were about the same age. This was a_______case of cross-species adoption in the wild, and the only documented example involving animals that are normally _______.
_______,the park workers thought the association would be brief, but this went on. The family were _______to tour the park. The lioness took care of the baby, and_________meat that she hunted. The new brothers played with him and occasionally followed him up trees. This unlikely________was surely amazing.
Although this adoption was puzzling, it highlights the________between the two species. Until they reach young adulthood, when social differences __________, lions and leopards play and beg for milk in similar ways. For this mother lioness, she may have ________the baby's more leopard-like features —his smell, size and spotted appearance. He just jumped in.
The__________ of the inter species adoption in the wild would be sweet enough for a children's book, yet________enough to attract scientists.
1.A.put up with B.take advantage of C.depend on D.fight with
2.A.scared B.adopted C.spotted D.attacked
3.A.lazy B.brave C.weak D.dangerous
4.A.feeding B.checking C.following D.dressing
5.A.simple B.typical C.famous D.rare
6.A.friends B.competitors C.partners D.neighbors
7.A.Initially B.Luckily C.Certainly D.Unexpectedly
8.A.expected B.observed C.persuaded D.pushed
9.A.cooked B.packed C.shared D.burned
10.A.experience B.affair C.agreement D.connection
11.A.communication B.similarities C.behavior D.differences
12.A.emerge B.remain C.recover D.survive
13.A.compared B.disliked C.ignored D.protected
14.A.incident B.experience C.report D.tale
15.A.strange B.caring C.reliable D.moving
高三英语完形填空中等难度题查看答案及解析
He is not a man to get along with, and I never feel ________ in his company.
A．with ease B．at ease C．for ease D．in ease
高三英语单项填空简单题查看答案及解析
Pretoria．South Africa—Hundreds 0f swimmers Play in the water along a South African beach．Suddenly a huge shark appears offshore and heads for the bathers．Before it can get close to the swimmers，the shark，for some mysterious reason，starts swimming parallel to the beach．Then it turns away from shore and heads out to sea，leaving the swimmers untouched．
Such a scene will soon become common along shark infested（鲨鱼出没）shores．An electrical engineer from the University of Pretoria has developed an electrical system that repels（击退）sharks by controlling their movements．Confused by this action，the sharks end up turning away from the beach．
In this unusual shark repellent method，an insulated（绝缘）cable is buried on the bottom of the sea around a beach from which people swim．When an electric current is sent though the cable，an electric field is produced in the water above the cable．
When the shark swims into the electric field，nerve cells just below the shark’s skin detect the field．The electricity produces a reflex（反射）action in the shark’s muscles，causing the dangerous animal with sharp teeth to swim parallel to the cable．Contused by increasing loss of control of its muscles，the shark suddenly changes its direction and heads seaward，away from the electric field．
In a test of the invisible new shark-repellent system，a cable was placed around a beach in St．Lucia an island in the tropics．A protective net，which had been installed around the beach a long time ago to keep sharks from swimmers，was left in place during the experiment．
When the electric field was 1eft on for more than a year and a half，no sharks were found in the nets．However,when the power was turned off，89 sharks ended up in the nets．
Using the electric wall method instead of nets to protect bathers would avoid the needless death of many sharks，say biologists．Currently，thousands of sharks die each year when they become trapped in protective nets that surround holiday resorts in Africa and Australia．About 10 to 15 humans are killed by sharks annually．
1.In the first passage，why doesn’t the shark attack the swimmers？
A．Because they are many swimmers in the water．
B．Because the shark doesn’t want to eat the swimmers。
C．Because of some mysterious reason from the God．
D．Because there is an invisible electric field confusing the shark．
2.An electrical engineer from the University of Pretoria has developed________．
A．A protective net B．A new shark-repellent system
C．The electric field D．An insulated cable
3.An electric field is produced in the water above the cable ________．
A．only when the shark swims into the electric field
B．an insulated cable is buried on the bottom of the sea around a beach from which people
swim
C．only when an electric current is sent though the cable
D．only when the sharks are trapped in protective nets
4.Which of the following is NOT TRUE according to the passage?
A．Protective nets had been installed around the beach earlier than the new shark repellent system．
B．This new kind of shark repellent system wilt take place of the protective nets．
C．Thousands of sharks die and about 10 to 15 humans are killed by sharks each year in Africa and Australia since this new system was Put into use．
D．Using the electric wall method instead of nets to protect bathers would avoid the needless death of many sharks．
高三英语阅读理解中等难度题查看答案及解析
For students who don't intend to improve themselves in study and always participate in various social activities, college is______ a social center.
A.at lowest B.at best C.at least D.at worst
高三英语单项填空中等难度题查看答案及解析
---Tom studies very hard and is intelligent as well.
---______that he always gets the first place in all examinations.
A. No way B. No wonder C. No problem D. No doubt
高三英语单项填空中等难度题查看答案及解析