As scientists in the Netherlands tried to figure out how to build a super flying robot, they learned from one of nature s flyers: the humble fruit fly(果蝇).And by building this robot, they’ve gained new insights into how the fly carries out one of its dangerous tasks.
The robot is called the DelFly Nimble Its wingspan(冀展)is about a foot wide. It has four wings that can beat at 17 times per second, which appear very delicate because they’re made of the same material as space blankets.
In the previous designs. they always had a tail, like a traditional airplane tail, said the robots main designer Matej Karasek. He’s based at the Micro Air Vehicle Laboratory at Delft University of Technology in the Netherlands, and he and his colleagues published their findings on Thursday in Science
“In the previous generations", he said, "flapping wings drove the robot forward while the tail helped to guide and stabilize it. But now the DelFly Nimble is completely controlled by the wings. The challenge then was actually combine the control into the wing movement, and that’s what we achieved, Karasek said
In the latest generation. the wings can each move individually or rotate(旋转)around the body of the robot in order to maximize the machine s agility(灵活 ) The robot can remain in one place in the air for about five minutes on a full battery or fly for more than a kilometer"， Karasek said, "And because the scientists are controlling all the movements, they can use the robot to learn more about how fruit flies actually carry out their dangerous tasks, which has caught the attention of biologists.”
1.Where did scientists get the creative idea of the flying robot?
A. From a fruit fly B. From the birds wings
C. From some fruit D. From an airplane
2.What does the underlined word "it" in Paragraph 4 probably refer to?
A. A full battery. B. A flapping wing.
C. The DelFly Nimble D. The humble fruit fly
3.What interests biologists most about fruit flies?
A. That they are very tiny insects.
B. That they conduct challenging tasks
C. That they can be easily found in the world.
D. That they have light wings and fly quickly.
4.Where is the text probably taken?
A. A research paper. B. A travel brochure
C. A health magazine D. A chemistry textbook
高一英语阅读理解中等难度题
As scientists in the Netherlands tried to figure out how to build a super flying robot, they learned from one of nature s flyers: the humble fruit fly(果蝇).And by building this robot, they’ve gained new insights into how the fly carries out one of its dangerous tasks.
The robot is called the DelFly Nimble Its wingspan(冀展)is about a foot wide. It has four wings that can beat at 17 times per second, which appear very delicate because they’re made of the same material as space blankets.
In the previous designs. they always had a tail, like a traditional airplane tail, said the robots main designer Matej Karasek. He’s based at the Micro Air Vehicle Laboratory at Delft University of Technology in the Netherlands, and he and his colleagues published their findings on Thursday in Science
“In the previous generations", he said, "flapping wings drove the robot forward while the tail helped to guide and stabilize it. But now the DelFly Nimble is completely controlled by the wings. The challenge then was actually combine the control into the wing movement, and that’s what we achieved, Karasek said
In the latest generation. the wings can each move individually or rotate(旋转)around the body of the robot in order to maximize the machine s agility(灵活 ) The robot can remain in one place in the air for about five minutes on a full battery or fly for more than a kilometer"， Karasek said, "And because the scientists are controlling all the movements, they can use the robot to learn more about how fruit flies actually carry out their dangerous tasks, which has caught the attention of biologists.”
1.Where did scientists get the creative idea of the flying robot?
A. From a fruit fly B. From the birds wings
C. From some fruit D. From an airplane
2.What does the underlined word "it" in Paragraph 4 probably refer to?
A. A full battery. B. A flapping wing.
C. The DelFly Nimble D. The humble fruit fly
3.What interests biologists most about fruit flies?
A. That they are very tiny insects.
B. That they conduct challenging tasks
C. That they can be easily found in the world.
D. That they have light wings and fly quickly.
4.Where is the text probably taken?
A. A research paper. B. A travel brochure
C. A health magazine D. A chemistry textbook
高一英语阅读理解中等难度题查看答案及解析
For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What's more, living things have energy and can reproduce, while the chemicals on the Earth 4 billion years ago were lifeless.
After years of study, scientists figured out that living things, including human bodies, are basically made of amino acids and nucleotide bases. These are molecules with millions of hydrogen, carbon, nitrogen, and oxygen atoms. How could such complicated molecules have been formed in the primitive soup? Scientists were stumped.
Then, in 1953, two scientists named Harold Urey and Stanley L. Miller did a very simple experiment to find out what had happened on the Primitive Earth. They set up some tubes and bottles in a closed loop, and put in some of the same gases that were present in the atmosphere 4 billion years ago: water vapor, ammonia, carbon dioxide, methane, and hydrogen.
Then they shot an electric spark through the gases to simulate bolts of lightning on the ancient Earth, circulated the gases through some water, sent them back for more sparks, and so on. After seven days, the water that the gases had been bubbling through had turned brown. Some new chemicals were dissolved in it. When Miller and Urey analyzed the liquid, they found that it contained amino acids-the very kind of molecules found in all living things.
1.When did scientists come to realize how the atoms and molecules on the Earth combined to make living thing?
A. 4 billion years ago. B.1953. C. After seven days.D. Many years later.
2.Scientists figured out that human bodies are basically made of .
A.amino acids
B.molecules
C. hydrogen, carbon, nitrogen and oxygen atoms
D. water vapor, ammonia, carbon dioxide, methane and hydrogen
3.Harold Urey and Stanley L.Miller did their experiment in order to .
A. find out what had happened on the Earth 4 billion years ago
B.simulate bolts of lightning on the ancient Earth
C. dissolve some new chemicals
D.analyze a liquid
4.At the end of the last paragraph, the underlined word "it" refers to .
A. a closed loop B. an electric spark C.water D. the liquid
5.According to the writer, living things on the Earth include .
A. atoms and molecules B.chemicals
C. plants, fish, dinosaurs and human beings D.the primitive soup
高一英语阅读理解中等难度题查看答案及解析
___young people see and hear in the media helps them to figure out how the world works.
A．Which B．That C．What D．How
高一英语单项填空中等难度题查看答案及解析
Everyone dreams. If you’ve ever tried to figure out the meaning of a strange dream, you’re not alone. Humans have been trying to make sense of dreams since recorded history. 1. Here are some of the findings.
2. People with great creativity are more likely to dream about unusual settings and about blocks in the natural world, such as a log or a rock they can’t get around.
You’ve got a heart problem. People who have frequent nightmares may be significantly more likely to suffer from an irregular heartbeat or chest pain. If you have those problems, it’s more difficult for you to breathe at night. 3.
You’re avoiding something. Do you dream about being followed by a stranger, a monster, or a giant tidal wave? This could indicate that you’re afraid to deal with something in your daily life. 4.
You’ll have a good result in a test. Students whose performance improved were those who had dreamed about the maze (迷宫) during the sleep. 5. This improves learning and problem-solving skills.
Despite the fact that technology has vastly expanded our understanding of dreaming, much of what occurs when we’re asleep remains as it has always been: a mystery.
A. How creative you are.
B. Dreaming may strengthen memories.
C. What kind of problem solver you are.
D. What can our dreams tell about ourselves?
E. How can we understand better about ourselves?
F. That explains why you cannot have a sound sleep.
G. Ask yourself what issue or emotion you’re faced with.
高一英语七选五中等难度题查看答案及解析
In order to find out how the famous painting was stolen as soon as possible, more experienced policemen have been sent to _____ the case.
| A．look for | B．look up | C．look into | D．look through |
高一英语单项填空困难题查看答案及解析
The scientists were trying to look for all possible _______ as to where this species came from.
A．signals B．marks C．clues D．spots
高一英语单项填空简单题查看答案及解析
It doesn't take a rocket scientist long time to figure out that there are better things you could do for your health than take deep breaths on a smoggy（烟雾的）day. A growing pile of research suggests that even relatively low levels of air pollution may be more harmful than previously realized, to both heart and lungs(肺). The latest articles from researchers, published this week in the New England Journal of Medicine, focuses on how particulate (微粒) matter from air pollution affects lung function.
“The effect of low levels of particulate pollution found in many urban areas is not unlike secondhand smoke,” experts say. Studies show that short-term effects from particulates include diminished（减少） lung function, coughing, wheezing, and heart attacks. Long-term exposure can also slow normal lung growth, damage lung airways, and increase the risk of dying from lung cancer.
Certain populations, such as the very old and the very young, are the most vulnerable to air pollution. However, even the most alarming studies conducted in the most polluted areas suggest that the average person's individual risk from exposure (暴露) is very slight. Relative risk numbers often seem more frightening than they actually are. For example, an earlier study published in the New England Journal of Medicine found that short-term exposure to traffic fumes tripled ( 成为3倍) the risk of heart attacks in heart-attack survivors.
Short of moving to the countryside or at least away from busy roads, shielding yourself from the effects of air pollution is not easy. Masks won't work. “At the very least,” suggests Murray Mittleman, a cardiologist at Harvard University, “people who regularly exercise outdoors near highways may want to consider remapping their route.”
66. What does the underlined sentence in the first paragraph mean?
A. Rocket scientists are making researches on people’s health.
B. It's obvious that air pollution has a bad effect on people’s health.
C. People aren't sure whether taking deep breaths on a smoggy day is bad.
D. People often have a hard time when taking deep breaths on a smoggy day.
67. The word "vulnerable" in Paragraph 3 probably means _________.
A. easy to be hurt B. easy to be protected
C. easy to be used D. easy to be saved
68. The main idea of Paragraph 3 is _________.
A. that even small risk from particulate causes big problems
B. that air pollution often leads to heart attack
C. who are most likely to get affected
D. that we shouldn't worry about the average low risk
69. In order to be healthier, you'd better _________.
A. take deep breaths B. wear a mask
C. live in a countryside D. clean the busy road
70. The passage is written in a(n) _________ tone.
A. subjective B. humorous C. doubtful D. objective
高一英语阅读理解简单题查看答案及解析
He went on talking while I tried to ______ what it meant.
A. come out B. set out C. take out D. figure out
高一英语单项填空中等难度题查看答案及解析
Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy; there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity(好奇). Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me “textbook questions” about schooling, salary(薪水) and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, “Now that we’re finished with your lists, do you have questions of your own about science?”
After a long pause, a boy raised his hand, “Have you ever seen a grasshopper(蚱蜢) eat? When I try eating leaves like that, I get a stomachache. Why?”
This began a set of questions that lasted nearly two hours.
Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less for an answer, no time for a child to think. When adults increase their “wait time” to three seconds or more, children give more logical(符合逻辑的), complete and creative answers.
Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with “That’s right” or “Very good”. These words work well when it comes to encouraging good behavior(行为). But in talking about science, quick praise can signal that discussion is over. Instead, keep things going by saying “That’s interesting” or “I’d never thought of it that way before”, or coming up with more questions or ideas.
Never push a child to “Think”. It doesn’t make sense, children are always thinking, without your telling them to. What’s more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target(目标) for your disagreement.
Lastly, show; don’t tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass(放大镜), and they’ll understand why you want them to wash before dinner. Rather than saying that water vaporates(蒸发), set a pot of water to boil and let them watch the water level drop.
1.According to the passage, children are natural scientists, and to raise their interest, the most important thing for adults to do is _______.
A. let them see the world around
B. share the children’s curiosity
C. explain difficult phrases about science
D. supply the children with lab equipment?
2.In the last sentence of the first paragraph, the word “lists” could best be replaced by ______.
A. any questions
B. any problems
C. questions from textbooks
D. any number of questions
3.According to the passage, children can answer questions in a more logical, complete and creative way if adults ________.
A. ask them to answer quickly
B. wait for one or two seconds after a question
C. tell them to answer the next day
D. wait at least for three seconds after a question
4.In which of the following paragraph(s) does the author tell us what to say to encourage children in a science discussion?
A. The second and third.
B. The fourth and fifth.
C. The fifth and sixth.
D. The seventh.
5.The author mentions all of the following techniques for adults to share with their children’s curiosity except that adults should ________.
A. tell their children stories instead of reciting facts
B. offer their children chances to see things for themselves
C. be patient enough when their children answer questions
D. encourage their children to ask questions of their own
高一英语阅读理解中等难度题查看答案及解析
Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy; there’s no need for a lot of scientific terms or expensive lab equipment. You only have to share your children’s curiosity(好奇).
Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me “textbook questions” about teaching, salary(薪水) and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, “Now that we’re finished with your lists, do you have questions of your own about science?” After a long pause, a boy raised his hand, “Have you ever seen a grasshopper(蚱蜢) eat? When I try eating leaves like that, I get a stomachache. Why?” This began a set of questions that lasted nearly two hours.
Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults often wait only one second or less for an answer, no time for a child to think. When adults increase their “wait time” to three seconds or more, children give more logical(符合逻辑的), complete and creative answers.
Thirdly, watch your language. Once you have a child involved in a science discussion, don’t jump in with “That’s right” or “Very good”. These words work well when you encourage their good behavior(行为). But in talking about science, quick praise can mean that discussion is over. Instead, keep things going by saying “That’s interesting” or “I’d never thought of it that way before”, or coming up with more questions or ideas.
Lastly, show and don’t tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass(放大镜), and they’ll understand why you want them to wash before dinner. Rather than saying that water evaporates(蒸发), set a pot of water to boil and let them watch the water level drop.
1.According to the passage, children are natural scientists, and to raise their interest, the most important thing for adults to do is _______.
A. to let them see the world around
B. to share the children’s curiosity
C. to explain difficult phrases about science
D. to supply the children with lab equipment
2.In the second paragraph, “your lists” could best be replaced by ______.
A. any questions
B. any problems
C. questions from textbooks
D. any number of questions
3. According to the passage, children can answer questions in a more logical, complete and creative way if adults ________.
A. ask them to answer quickly
B. wait for one or two seconds after a question
C. tell them to answer the next day
D. wait at least for three seconds after a question
4.In which paragraph does the author tell us what to say to encourage children in a science discussion?
A. The second B. The third
C. The fourth D. The fifth
5.The author mentions all of the following techniques(技巧) for adults to share with their children’s curiosity except that adults should ________.
A. tell their children stories instead of reciting (背诵) facts
B. offer their children chances to see things for themselves
C. be patient enough when their children answer questions
D. encourage their children to ask questions of their own
高一英语阅读理解中等难度题查看答案及解析