Migration(迁徙), is a long journey carried out by some birds to other areas where they hope to find more food and a warmer place to spend winter. Hundreds or thousands of miles' journey is actually difficult and dangerous. So why do birds migrate?1.However, it all comes down to survival.
Migrating for a Meal
For all birds, one of the main driving forces behind migration is food shortage. If all birds were to stay in the same warm regions all the year round, food would become lacking and producing their young would be less successful. As food resources are rich in the north each spring, millions of birds migrate there for the food supplies.2.
Migrating for Family
Over thousands of years, birds have evolved different migration patterns, timing and destinations to fly around the world to produce their young. Birds take advantage of a wide variety of suitable conditions to raise their young.3.
Migrating for Climate
Birds have evolved different types of feathers to survive different climates.4.So many birds leave the Arctic producing grounds, for example, when temperatures begin to fall and they need warmer habitats. Similarly, the hottest regions can be a bad environment for raising little chicks, and they will choose cooler areas to lay eggs.
Migrating for Predators(掠食动物)
Habitats that have rich food resources all the year round also attract a greater number of predators that can threaten their nests.5.It gives their young a better chance of reaching maturity. Many birds even migrate to specialized habitats that are nearly inaccessible to predators.
A.Birds always tend to fly to warmer places.
B.And changes in those climates can affect migration.
C.This increases the surviving chances of little chicks.
D.Birds have adapted themselves to their own surroundings.
E.There is more than one reasons for different birds to migrate
F.As the food supplies decrease in fall, they return to warm regions.
G.So birds migrate to different habitats to avoid being eaten by predators.
高二英语七选五中等难度题
Migration(迁徙), is a long journey carried out by some birds to other areas where they hope to find more food and a warmer place to spend winter. Hundreds or thousands of miles' journey is actually difficult and dangerous. So why do birds migrate?1.However, it all comes down to survival.
Migrating for a Meal
For all birds, one of the main driving forces behind migration is food shortage. If all birds were to stay in the same warm regions all the year round, food would become lacking and producing their young would be less successful. As food resources are rich in the north each spring, millions of birds migrate there for the food supplies.2.
Migrating for Family
Over thousands of years, birds have evolved different migration patterns, timing and destinations to fly around the world to produce their young. Birds take advantage of a wide variety of suitable conditions to raise their young.3.
Migrating for Climate
Birds have evolved different types of feathers to survive different climates.4.So many birds leave the Arctic producing grounds, for example, when temperatures begin to fall and they need warmer habitats. Similarly, the hottest regions can be a bad environment for raising little chicks, and they will choose cooler areas to lay eggs.
Migrating for Predators(掠食动物)
Habitats that have rich food resources all the year round also attract a greater number of predators that can threaten their nests.5.It gives their young a better chance of reaching maturity. Many birds even migrate to specialized habitats that are nearly inaccessible to predators.
A.Birds always tend to fly to warmer places.
B.And changes in those climates can affect migration.
C.This increases the surviving chances of little chicks.
D.Birds have adapted themselves to their own surroundings.
E.There is more than one reasons for different birds to migrate
F.As the food supplies decrease in fall, they return to warm regions.
G.So birds migrate to different habitats to avoid being eaten by predators.
高二英语七选五中等难度题查看答案及解析
After the 5-hour long journey，all the tourists were——and desperate to have a good rest．
A．turned out B．given out C．let out D·worn out
高二英语单项填空中等难度题查看答案及解析
After the 5-hour long journey，all the tourists were——and desperate to have a good rest．
A．turned out B．given out C．let out D·worn out
高二英语单项填空简单题查看答案及解析
For a generation now, school reform has meant what students must be taught and carried out by standardized（标准化的）tests.
Here’s a thought experiment. Suppose that next year almost every student passed the tests. What would the reaction be from people? Would they shake their heads in respect and say, “Damn, those teachers must be good!”?
Of course not. Such remarkable success would be used as evidence that the tests were too easy and it needs to raise standards. “High standards” really means “standards that all students will never be able to meet”. My little thought experiment uncovers a truth that we have been taught to respond with doubt whenever all members of any group are successful. In America, success doesn’t count unless it is got by only a few.
Consider widespread complaints about “grade inflation（膨胀）” in higher education. Many people don’t even bother to stress that grades have risen over time. They simply point to how many students get A’s right now. The goal, in other words, isn’t to do well but to defeat other people who are also trying to do well. Grades in testing should be used to announce who’s beating whom. A school’s final task, apparently, is not to help everyone learn but to prepare the game so that there will always be losers.
This makes no sense in any situation. Perhaps, for example, we can defend rating states or nations based on the quality of their air, health care or schools, but ranking them is foolish. School testing ranking doesn’t lead to improvements in performance but tends to hold us back from doing our best. It makes productive teamwork less likely and leads all concerned to focus not on meaningful improvements but on trying to beat everyone else.
Most of all, it encourages the false belief that excellence is a zero-sum game. It would be more reasonable to rescue the spirit of the concept: Everyone may not succeed, but at least in theory all of us could.
1.What did the writer’s thought experiment prove?
A.Good teachers represent higher test scores.
B.Excellence is regarded as a rare thing.
C.American tests are usually too easy.
D.Students don’t meet the test standards.
2.What does the writer think American schools seem to do?
A.Promote teachers to teach better. B.Remove the belief of beating others.
C.Help all students do well at school. D.Ensure the existence of failures.
3.What is the writer’s attitude towards schools testing ranking?
A.Disapproving. B.Optimistic.
C.Sympathetic. D.Unconcerned.
4.What is the best title for the text?
A.How Can Students Succeed? B.Why Can’t Everyone Get A’s?
C.What Standards Do Schools Set? D.Who Get Best Grades at School?
高二英语阅读理解中等难度题查看答案及解析
Recently a new study has been carried out. It shows students who write notes by hand during lectures perform better on exams than those who use laptops.
Students are increasingly using laptops for note-taking because of speed and legibility (清晰度). But the research has found laptop users are less able to remember and apply the concepts they have been taught.
Researchers performed experiments that aimed to find out whether using a laptop increased the tendency to make notes “mindlessly” by taking down word for word what the professors said.
In the first experiment, students were given either a laptop or pen and paper. They listened to the same lectures and were told to use their usual note-taking skills. Thirty minutes after the talk, they were examined on their ability to remember facts and on how well they understood concepts.
The researchers found that laptop users took twice as many notes as those who wrote by hand. However, the typists performed worse at remembering and applying the concepts. Both groups scored similarly when it came to memorizing facts.
The researchers’ report said, “While more notes are beneficial, if the notes are taken mindlessly, as is more likely the case on a laptop, the benefit disappears.”
In another experiment aimed at testing long-term memory, students took notes as before but were tested a week after the lecture. This time, the students who wrote notes by hand performed significantly better on the exam.
These two experiments suggest that handwritten notes are not only better for immediate learning and understanding, but that they also lead to superior revision in the future.
1.More and more students favor laptops for note-taking because they can .
A. get higher scores
B. digest concepts better
C. write more notes
D. understand lectures better
2.While taking notes, laptop users tend to be .
A. skillful
B. tireless
C. thoughtful
D. mindless
3.The author of the passage aims to .
A. examine the importance of long-term memory
B. explain the process of taking notes
C. stress the benefit of taking notes by hand
D. promote the use of laptops
4.The passage is likely to appear in .
A. a science magazine
B. a newspaper advertisement
C. a computer textbook
D. a finance report
高二英语阅读理解中等难度题查看答案及解析
It is suggested that Mr. Li his plan.
A. carry out B. can carry out
C. carries out D. has carried out
高二英语单项填空中等难度题查看答案及解析
根据首字母和英文解释完成下面的句子（每题1分，共11分）。
1.A survey c______(carry out; do) by China Daily shows that about 50% of the students use the Internet to study.
2.His words were beginning to a______(being angry or not pleased) me but he realized it and changed the topic.
3.Those who d_____( to refuse to do what a person, law, order, etc. tells you to do) must be punished by law.
4.In my opinion, the design is s_______(right for someone) for middle-aged women.
5.What we choose and decide forms our life, but a________(a strong wish to succeed) decides our choice and decision.
6.I was a bit a_______(worried or frightened) at how much weight she’d lost.
高二英语单词拼写中等难度题查看答案及解析
1
It is demanded that the plan _____ out as soon as possible.
A. must be carried B. is to carry out C. carried D. be carried
高二英语简单题查看答案及解析
It is demanded that the plan _____ out as soon as possible.
A．must be carried B．is to carry out C．carried D．be carried
高二英语单项填空中等难度题查看答案及解析
It is demanded that the plan _____ out as soon as possible.
A．must be carried B．is to carry out C．carried D．be carried
高二英语单项填空中等难度题查看答案及解析