Which animal has the fastest snapping jaw (颚)? If you're guessing a shark or perhaps a larger animal, you'll have to think smaller. The trapjaw ant, which lives in Central and South America, moves its mouth parts at 35 to 63 meters per second. Another way to think about this is that the ant's jaws close at 125 to 233 kilometers per hour. That's 2, 300 times faster than the blink of an eye.
Scientists were able to measure the amazing jaw speed using highspeed video techniques. Sheila Patek, a biologist, says the key is that the jaws have a springy (有弹性的) system, which is critical in getting explosive (爆发性的) speeds.
Consider a bow and arrow. If you try to throw an arrow with your arm, it won't go very far. If you use a bow, elastic energy stored in the bow is released almost instantly when you release the arrow with your finger or a latch. The combination of the springy bow and latch mechanism is what makes the arrow zoom through the air.
Maybe even more amazing than how fast these ants grab food or even enemies is how they use this same energy to move. As the ant closes its jaws, it uses them to push off the ground—all faster than the eye can see without slow motion video. A snap of the jaw can send an ant up to 8.3 centimeters into the air. That's like someone who is 1.7 meters jumping 13 meters high! Not only can they quickly escape from enemies, but often a group of ants will start jumping all at once. It would be hard for their enemies to grab just one.
People have suspected the ants used their jaws to jump for over a century, but could only prove it with today's modern video equipment.
59. The fast speed of the trapjaw ant's jaw lies in ________.
A. its light body
B. its springy system
C. its living environment
D. the length of its jaw
60. The passage uses “a bow and arrow” as an example to show ________.
A. how an arrow gets so much energy to fly
B. why the trapjaw ants have springy system
C. why the trapjaw ants jaws move so fast
D. how a bow and arrow works
61. Which of the following may amaze the scientists most?
A. How high the ants can leap by using their jaws.
B. How quickly the trapjaw ants can move on the ground.
C. How wonderfully the springy system in the trapjaw ants' jaws works.
D. How quickly the trapjaw ants can grab food or enemies.
62. According to the passage, the trapjaw ants' jaws keep them safe because ________.
A. they can catch their enemies easily with their jaws
B. their jaws make them difficult to recognize
C. their jaws help them find food easily
D. their jaws help them escape from their enemies
发散思维新课堂系列答案科目：高中英语 来源： 题型：阅读理解
In 1879, a group of explorers made an incredible find. They discovered paintings of remarkable beauty on the walls of a cave in Spain. Some scientists believed that these paintings were created by early humans from the Stone Age, between ten and thirty thousand years ago. Other scientists and the public did not believe the claim, but over the years, it was proven correct. Our ancestors had incredible artistic talents.
Most of the cave art that has been discovered has been found in Spain and France. A smaller number of such caves are located in Italy, Portugal, Russia, and other countries. Scientists believe that many more caves will be discovered in the coming years, and are concentrating their efforts on Africa and the area between Europe and Asia. These two regions of the world were, populated first by humans.
Cave art was carved or painted on the walls and roofs of caves, usually near the entrance. The entrance area was probably chosen to take advantage of daylight and to allow many people to view the paintings. In some cases, the art appears much deeper in caves and requires artificial light. Evidence suggests that the artists used torches or shallow bowls in which animal fat was burned.
9.What was the response of general public to the discovery of cave art made by Stone Age people?
A. They believed it at first.
B. They did not believe it.
C. They thought it was beautiful.
D. They ignored it.
10.According to the passage, what can we conclude about animal fat?
A. It does not burn.
B. Stone Age artists used it to preserve their paintings.
C. It can be burned to produce light.
D. Stone Age artists mixed it with their food.
11.. Where do scientists expect to find more cave paintings?
A. In Central and South America.
B. In Spain and France.
C. In the places where there are caves with large openings.
D. In the regions of the world first populated by humans.
12.Where would this passage be most likely to appear?
A. In a textbook about early human history.
B. In a textbook about modern art.
C. In a dictionary.
D. In an encyclopedia entry about caves.
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科目：高中英语 来源： 题型：阅读理解
In 1879, a group of explorers made an incredible find. They discovered paintings of remarkable beauty on the walls of a cave in Spain. Some scientists believed that these paintings were created by early humans from the Stone Age, between ten and thirty thousand years ago. Other scientists and the public did not believe the claim, but over the years, it was proven correct. Our ancestors had incredible artistic talents.
Most of the cave art that has been discovered has been found in Spain and France. A smaller number of such caves are located in Italy, Portugal, Russia, and other countries. Scientists believe that many more caves will be discovered in the coming years, and are concentrating their efforts on Africa and the area between Europe and Asia. These two regions of the world were, populated first by humans.
Cave art was carved or painted on the walls and roofs of caves, usually near the entrance. The entrance area was probably chosen to take advantage of daylight and to allow many people to view the paintings. In some cases, the art appears much deeper in caves and requires artificial light. Evidence suggests that the artists used torches or shallow bowls in which animal fat was burned.
What was the response of general public to the discovery of cave art made by Stone Age people?
A. They believed it at first.
B. They did not believe it.
C. They thought it was beautiful.
D. They ignored it.
According to the passage, what can we conclude about animal fat?
A. It does not burn.
B. Stone Age artists used it to preserve their paintings.
C. It can be burned to produce light.
D. Stone Age artists mixed it with their food.
Where do scientists expect to find more cave paintings?
A. In Central and South America.
B. In Spain and France.
C. In the places where there are caves with large openings.
D. In the regions of the world first populated by humans.
Where would this passage be most likely to appear?
A. In a textbook about early human history.
B. In a textbook about modern art.
C. In a dictionary.
D. In an encyclopedia entry about caves.
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科目：高中英语 来源：2011-2012学年江西省高安中学高二上学期期中考试英语试卷 题型：完型填空
Two friends visited the zoo together. The zoo was very large and it was 36 to go everywhere. They had to decide where and which animal to visit as their time was 37 . So both of them agreed not to 38 after choosing a 39 at every fork (岔路口).
A road sign at the first fork 40 one way to the lion quarters and the other to the tiger hill. They decided on the 41 after a 42 discussion because lions were “the king of the grassland”. The second showed a division (路口) going separately to the panda and peacock. They 43 panda as it was the nation’s treasure and went its way. Thus they made choices all along the way and each choice meant 44 what they could regret. But they had to make it 45 , for it brooked (容忍) no delay. If they hesitated they would miss 46 . Only 47 decision could offer more chances for sightseeing and 48 possible regret.
Life is 49 like this—choices often occur that one has to make, for example, between two 50 jobs, two fascinating wooers (追求者). To get one you 51 give up the other—you can get half of it. If you 52 weighing the pros and cons(权衡利弊) and calculating gains and losses, you will most likely 53 empty-handedness. Don’t be sad about it. 54 you have got half of the desirable things in life—something that is 55 to get.
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科目：高中英语 来源：2012-2013学年浙江省宁海县正学中学高二下学期第一次阶段性测试英语试卷（带解析） 题型：阅读理解
There are many wetlands(湿地) in China and some of them have become the world’s important wetlands. The Chinese Yellow Sea Wetlands are among them. They are in Yancheng，Jiangsu Province. They are home of many different kinds of birds and animals. The world’s largest Milu Deer Nature Reserve(自然保护区) is in them. More than 700 milu deer live freely there.
The temperature in the wetlands is usually neither too high nor too low. There is a lot of rain and sunshine，too. They are really good places for wildlife. Offering food and home for some special kinds of animals and birds is not the only reason why we need to protect wetlands.
Wetlands are important because they also prevent flood. But some people want to change the wetlands to make more space for farms and buildings. This means there will be less and less space for wildlife.
Luckily, more and more people are beginning to realize the important of wetlands and wildlife. Every year, on February 2nd many activities are held to tell people more about wetlands around the world.
【小题1】 Which animal is mentioned in the passage?
A B C D
【小题2】Usually the weather in the wetlands is ____.
| A．hot | B．mild | C．cold | D．dry |
| A．they are home of wildlife |
| B．they can prevent flood |
| C．they offer food to the wildlife |
| D．they will be good farmland |
| A．China’s wetlands –the Biggest One in the World |
| B．Wetlands --- Home of Wildlife and Human Beings |
| C．Special Animals --- Found in Yellow Sea Wetlands |
| D．Wetlands --- the Last Valuable Land on the Earth |
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科目：高中英语 来源：2013届江西省高二上学期期中考试英语试题 题型：完型填空
Two friends visited the zoo together. The zoo was very large and it was 36 to go everywhere. They had to decide where and which animal to visit as their time was 37 . So both of them agreed not to 38 after choosing a 39 at every fork (岔路口).
A road sign at the first fork 40 one way to the lion quarters and the other to the tiger hill. They decided on the 41 after a 42 discussion because lions were “the king of the grassland”. The second showed a division (路口) going separately to the panda and peacock. They 43 panda as it was the nation’s treasure and went its way. Thus they made choices all along the way and each choice meant 44 what they could regret. But they had to make it 45 , for it brooked (容忍) no delay. If they hesitated they would miss 46 . Only 47 decision could offer more chances for sightseeing and 48 possible regret.
Life is 49 like this—choices often occur that one has to make, for example, between two 50 jobs, two fascinating wooers (追求者). To get one you 51 give up the other—you can get half of it. If you 52 weighing the pros and cons(权衡利弊) and calculating gains and losses, you will most likely 53 empty-handedness. Don’t be sad about it. 54 you have got half of the desirable things in life—something that is 55 to get.
1.A. easy B. impossible C. eager D. possible
2.A. limited B. enough C. tight D. plentiful
3.A. go B. come C. return D. reach
4.A. main road B. highway C. crossing D. branch
5.A. had B. showed C. intended D. pointed
6.A. last B. latter C. former D. the third
7.A. long B. brief C. no D. heated
8.A. hoped B. wanted C. got D. favored
9.A. getting B. taking C. giving up D. grasping
10.A. immediately B. slowly C. hardly D. easily
11.A. less B. most C. more D. least
12.A. rapid B. slow C. short D. high
13.A. increase B. reduce C. cause D. raise
14.A. absolutely B. hardly C. more or less D. most
15.A. desirable B. rejected C. enjoyable D. unwanted
16.A. wish B. have to C. must D. want
17.A. kill time B. spend time C. have a hard time D. hope for
18.A. start with B. get up C. end up in D. succeed in
19.A. At least B. Not in the least C. At most D. By no means
20.A. hard B. delighted C. stupid D. supported
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