In a sports team each player has a clear role...

In a sports team each player has a clear role，and there are few occasions         members are confused or uncertain of their roles．

高三英语单项填空简单题查看答案及解析

In a sports team each player has a clear role, and there are few occasions ________members are confused or uncertain of their roles.

A. why        B. where      C. when         D .in which

高三英语单项填空困难题查看答案及解析

In a sport team each player has a clear role，and there are few ______when members are uncertain of their roles.

A. occasions          B. positions          C. chances      D. situations

高三英语单项填空中等难度题查看答案及解析

In a sports team each player has a clear role，and there are few _______when members are

uncertain of their roles．

A．occasions        B．positions          C chances             D．situations

高三英语单项填空简单题查看答案及解析

In sports, sometimes a player has to take one for the team. The same appears to be true in the plant world, where reduced individual growth can benefit the broader community. The findings from the University of Michigan’s Paul Glaum and André Kessler of Cornell University help explain the persistence (持续存在) of some plant communities when theory predicts they should go extinct(绝种的).

“We looked at how chemical defense cues (信号) from plants, meant to prevent herbivores (食草动物), can also prevent pollinators,” said Glaum, a doctoral student in the U-M Department of Ecology and Evolutionary Biology. “The surprising model result is that while this can lead to fitness losses for individuals, the population effects can be positive for pollinators and plants under some circumstances.”

Many plants, including the wild tomato species used in this study, produce chemical compounds to repel (排斥) insect pests and other hungry herbivores. But those same chemical defenses can reduce the number of visits to the plant by pollinators such as bees, resulting in less pollination of individual plants and decreased growth.

“Biologists have puzzled over how such a costly defense mechanism (机制) can be maintained in these plant populations,” Glaum said. “How would a plant population with such a strategy persist?” Glaum and Kessler developed a computer model showing that decreased growth of individual plants can benefit overall populations and community resilience (恢复力) by indirectly controlling herbivore population growth. The results introduce mechanisms of persistence into communities previously found to be prone (易于遭受的) to extinction in theoretical models.

Tomatoes and other plants produce repellent chemicals called volatile (易挥发的) organic compounds in response to herbivore attacks. The presence of these so-called herbivore-induced volatile organic compounds can make the plant less attractive to pollinators, which can reduce pollen deposition (沉淀物) and negatively affect individual plants, an effect known as herbivore-induced pollinator limitation.

Previous modeling studies have looked at the direct effects of herbivory on a three-species community: flowering plant, pollinator and herbivore. Some of those studies predicted extinctions because growing herbivore populations would reduce the number of plants, limiting resources available to pollinators. In response, the pollinator population would decline, lowering plant reproduction.

1.According to the passage, the persistence of some plant communities may depend on __________.

A. chemical defenses of plants　　 B. increased individual growth

C. reduced chemical compounds　　 D. defense mechanisms of pollinators

2.The underlined word pollinator in Paragraph 2 probably refers to __________.

A. a kind of insects that help plants reproduce　　 B. a kind of animals that eat plants

C. a process of forming a plant community　　 D. a chemical that does harm to plants

3.Volatile organic compounds are __________.

A. less attractive to pollinators

B. able to have negative effects on individual plants

C. known as herbivore-induced pollinator limitation

D. chemicals produced by plants to attract herbivores

高三英语阅读理解困难题查看答案及解析

In our life of journey, we each have important roles to play. Some are conductors and some are singers. And the rest are heroes in the supporting cast(配角演员) and are necessary to complete the different tasks in life. The “stars” would be greatly darkened if the individual heroes don’t support their performances. The magical accents of the performance section might sound terrible and out of place, unless you could also hear the music they accompany. Even one member of an orchestra doing less than their best could stop the harmony of the musical piece.

So even though you may not receive the attention of the other performers, your contribution is valuable and a unique part of the success of the whole in the life you lead.

When you do your job well, you put your own unique energy into the task. Each of us has a different personality and a different talent, just suited for the different roles we support. We can look around us at any moment and identify with the people we work with. Doing your job well displays your ability and gratitude, while learning the lessons from others can move us towards our goals.

When you are fully present in the job you do, you bring the fullness of your mind, body, and spirit to the moment. Your contribution is strengthened by your talents and abilities, and they can attract the right people and circumstances to your experience. You are playing your role to your very best. You are giving your best to be the world and making it a better place for all of us to live in. Remember, each of us is expected to be the best.

1.What does the first paragraph mainly discuss?

A. The “stars’ also need many other people’s support.

B. One person might perform different roles.

C. You are a failure unless you become the “stars’.

D. The “stars” are successful because of their own efforts.

2.According to the author, doing the job well can help you _________.

A. get a rise in your company

B. show your ability and talents

C. receive the attention of others

D. get a sense of success

3.What can we learn from the text?

A. No pains, no gains.

B. Practice makes perfect.

C. All roads lead to Rome.

D. Everyone is expected to do his best.

高三英语阅读理解中等难度题查看答案及解析

In our life of journey, we each have important roles to play. Some are conductors and some are singers. And the rest are heroes in the supporting cast(配角演员) and are necessary to complete the different tasks in life. The “stars” would be greatly darkened if the individual heroes don’t support their performances. The magical accents of the performance section might sound terrible and out of place, unless you could also hear the music they accompany. Even one member of an orchestra doing less than their best could stop the harmony of the musical piece.

So even though you may not receive the attention of the other performers, your contribution is valuable and a unique part of the success of the whole in the life you lead.

When you do your job well, you put your own unique energy into the task. Each of us has a different personality and a different talent, just suited for the different roles we support. We can look around us at any moment and identify with the people we work with. Doing your job well displays your ability and gratitude, while learning the lessons from others can move us towards our goals.

When you are fully present in the job you do, you bring the fullness of your mind, body, and spirit to the moment. Your contribution is strengthened by your talents and abilities, and they can attract the right people and circumstances to your experience. You are playing your role to your very best. You are giving your best to be the world and making it a better place for all of us to live in. Remember, each of us is expected to be the best.

1.What does the first paragraph mainly discuss?

A. The “stars’ also need many other people’s support.

B. One person might perform different roles.

C. You are a failure unless you become the “stars’.

D. The “stars” are successful because of their own efforts.

2.According to the author, doing the job well can help you _________.

A. get a rise in your company

B. show your ability and talents

C. receive the attention of others

D. get a sense of success

3.What can we learn from the text?

A. No pains, no gains.

B. Practice makes perfect.

C. All roads lead to Rome.

D. Everyone is expected to do his best.

高三英语阅读理解中等难度题查看答案及解析

often teach about happiness and what has become clear is this：There are some qualities always unhappy people have．Here are some of them．

Happy people know life can be hard and tend to live through hard times．They take responsibility for how they got themselves into a mess，and focus on getting themselves out of it as soon as possible．Unhappy people see themselves as victims of life and stay stuck in the“look what happened to me” attitude instead of finding a way through and out to the other side．

Most happy people believe in the good in people instead of thinking everyone is out to get them．Generally open and friendly towards people they meet，happy people foster(培养)a sense of community around themselves and meet new people with all open heart．Unhappy people are distrustful of most people they meet and don’t think strangers can be trusted．Unfortunately，this behavior slowly closes all chances of meeting new friends．

Unhappy people believe someone else’s good fortune steals from their own．They believe there’s not enough goodness to go around and always compare others’against theirs．This leads to jealousy(嫉妒)．Happy people know that others’good luck and circumstance are just signs of what they also can achieve if they try hard enough．They believe in unlimited possibilities and don’t get stuck in thinking one person’s good fortune limits their possible outcome in life．

There’s only so much space between the two ears．Unhappy people fill that space with constant worry and fear．Happy people experience fear and worry too，but make an important difference between feeling it and living with it．When fear or worry crosses a happy person’s mind，they’ll ask themselves if there’s an action they can take to prevent their fear or worry from happening and they take it．If not，they realize they’re spinning in fear and they lay it down．

1.Paragraph 2 mainly shows that unhappy people tend to _______________．

A．focus on what they really want

B．get worried about what will happen

C．stay focused on the past misfortunes

D．find a way to live through hard times

2.According to paragraph 3 and 4，unhappy people ______________．

A．like making some new friends

B．hate seeing others with good fortune

C．are more likely to be cheated by strangers

D．believe they can get good luck by working hard

3.What is implied about happy people?

A．They don’t think life is hard．

B．They hardly ever fear anything．

C．They try to get out of their fear or worries．

D．They don’t believe in every people they meet．

4.How is the text mainly developed?

A．By making comparisons．

B．By giving examples．

C．By showing detailed data．

D．By proving some theories．

高三英语阅读理解中等难度题查看答案及解析

There is probably no field of human activity in which our values and lifestyles are shown more clearly and strongly than they are in the clothes that we choose to wear.The dress of an individual is a kind of “sign language” that communicates a set of information and is usually the basis on which immediate impressions are formed.Traditionally,a concern for clothes was considered to be an affair of females,while men took pride in the fact that they were completely lacking in clothes consciousness(意识).

This type of American culture is by degrees changing as man dress takes on greater variety and color.Even as early as 1955,a researcher in Michigan said that men attached rather high importance to the value of clothing in daily life. White collar workers in particular viewed dress as a symbol(象征)of ability,which could be used to impress or influence others,especially in the work situation.The white collar worker was described as extremely concerned about the impression his clothing made on his superiors(上司).Although blue collar workers were less aware(察觉到的)that they might be judged on the basis of their clothing,they recognized that any difference from the accepted pattern of dress would be made fun of by fellow workers.

Since that time,of course,the patterns have changed:the typical office worker may now be wearing the blue shirt,and the laborer a white shirt;but the importance of dress has not become less.Other researchers in recent years have helped to prove its importance in the lives of individuals at various age levels and in different social and economic status groups(阶层).

1.The passage tells us that _______.

A.our values and lifestyles are in no field of human activity

B.the clothes that we choose to wear have something to do with our values and lifestyles

C.our values and lifestyles are from the sign language

D.the clothes we choose to wear depend on a set of information and immediate impression

2.Traditionally,people usually thought that _______.

A.men cared very much for clothes

B.women were concerned greatly about what they wore while men didn’t

C.both men and women paid great attention to their clothes

D.neither men nor women showed interest in clothes

3.Blue collar workers pay attention to their clothes because _______.

A.they are concerned about the impression their clothes make on their superiors

B.they know very clearly that people will judge them on the basis of their clothing

C.they want to impress and influence others

D.they don’t want to be laughed at

4.Which of the following can best explain the underlined sentence in the second paragraph?

A.Men thought the value of clothing in daily life was very important.

B.Men didn’t pay attention to the importance of the value of clothing in daily life.

C.Men thought little of the importance of the value of clothing in daily life.

D.Men were concerned little about the value of clothing in daily life.

5.The passage mainly suggests that _______.

A.now men pay more attention to their clothes than women do

B.women always like beautiful dresses

C.people have paid more and more attention to the importance of dress

D.American culture is changing greatly

高三英语阅读理解中等难度题查看答案及解析

Which sport has the most expense _________ training equipment, player’s personal equipment and uniforms?

高三英语单项填空中等难度题查看答案及解析