Scientific experiments __________ by students...

Scientific experiments __________ by students without the teachers’ instructions can be dangerous.

高三英语单项填空简单题查看答案及解析

In making a scientific experiment, one should not be _____ by temporary setbacks but should stick to doing it hopefully.

A. cast down　　　　　　 B. put away　         C. taken in　　　　         D. put out

高三英语单项填空中等难度题查看答案及解析

阅读理解。

Every scientific field uses the scientific method to conduct experiments. Performing experiments is very important in the field of psychology （心理学）. Before beginning a study, however, any scientist who wishes to perform an experiment should be familiar with the steps of the scientific method. 1.

◆ Form a hypothesis （假设）. It is an educated guess about what will happen during the study. 2. Coming up with a hypothesis before you start can help guide your experiment.

◆ Plan out a study. Planning out the experiment is essential because the psychologist needs to know if they have time, materials, and testing area prepared beforehand. This step also helps the scientist to determine if they will be performing descriptive or experimental research. The ideal situation is to always perform experimental research. 3. Descriptive research simply collects data regarding the problem and forms a hypothesis according to the data.

◆ Collect data. 4. If the data collected is not recorded and organized, the entire efforts of the study may be wasted. The best way to do this may be to record the proceedings so that no details are lost.

◆ Analyze the data.　 Once all the data has been collected and organized, it must be analyzed. Using previous research or scientific information about the problem, the psychologist must apply the new data gathered.

◆ Publish the information learned. The final step of the scientific method in psychology is publishing the results of the study. 5. Most psychological experiments are published in scientific journals.

A. It is based on scientific facts, not just opinions.

B. Read on to find out how to use the scientific method in psychology.

C. Before psychologists start the experiment, they must plan out the steps.

D. This helps other psychologists to learn about and use the new information.

E. The scientific method has proved to be an effective way to conduct research.

F. To fully understand the study, each part of the experiment must be recorded.

G. Sometimes, however, this is impossible and descriptive research will have to be used.

高三英语阅读理解中等难度题查看答案及解析

Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country's bees. He imported a very active type of African bee from Tanzania and mated  (交配)  it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.

Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

1.The results of the South American experiment   ________ .

A. have caused a serious trouble        B. have proved to be wrong

C. are not yet certain                 D. are not important

2.The experiment mentioned in this passage was designed to   ________ .

A. increase the amount of honey in Brazil      B. make Brazilian bees more easy-going

C. increase the number of bees in Brazil       D. make African bees less active

3.Which of the following may be the cause of the new bees' attacking personalities?

A. Their production of honey.        B. Their hard work.

C. Their living environment.         D. Their bad temper.

4.The last paragraph implies that  ________ .

A. the bees have been driven to Central and North America

B. the bees may bring about trouble in more countries

C. the bees must be stopped from moving north

D. the bees prefer to live in Brazil

高三英语阅读理解中等难度题查看答案及解析

Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country’s bees. He imported a very active type of African bee from Tanzania and mated (交配)it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.

Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

1. The results of the South American experiment________.

A. are not yet certain               B. have proved to be wrong

C. have caused a serious trouble      D. are not important

2. The experiment mentioned in this passage was designed to   ________ .

A. make African bees less active

B. make Brazilian bees more easy-going

C. increase the number of bees in Brazil

D. increase the amount of honey in Brazil

3. Which of the following may be the cause of the new bees' attacking personalities?

A. Their production of honey.     B. Their living environment.

C. Their hard work.             D. Their bad temper.

4. The last paragraph implies that  ________ .

A. the bees have been driven to Central and North America

B. the bees must be stopped from moving north

C.the bees may bring about trouble in more countries

D. the bees prefer to live in Brazil

高三英语阅读理解中等难度题查看答案及解析

More and more scientific experiments prove that physical exercise can reduce the dangers of some illnesses in middle-aged persons．Exercise strengthens the heart muscle，reduces blood pressure and help to prevent muscles from changing into fat．Physical exercise is just as important for children．

Exercise and food affect growing speed in young lab animals．Baby mice start running as soon as they are big enough to use an exercise wheel in their cage．If  they get extra food and run a lot，they will grow as much as 1.5 times bigger than normal．

The same differences in growing speed might be found between active and inactive children．Physical exercise helps active children grow faster than inactive children．One experiment shows that the brains of the mice that had enough exercise weighed about 3％more than those of the mice that did not exercise The mice that exercised are much quicker to learn doing new exercise than the mice that did not exercise．

The results of the experiments suppose the theory that exercise can help babies learn to talk and walk sooner than expected．

The good effects of physical exercise are not limited to children and middle-aged people．Exercise continues to be an important part of our lives after we grow old．For example，people over 50 years old begin to lose calcium(钙) from their bones，which get weaker and can break easily．Physical exercise，however，helps to strengthen the bones and to prevent them from losing calcium．Of course，old people can take medicines to prevent themselves from suffering from losing calcium．But the medicines they take increase the chance of developing some kind of cancer(癌)．So physical exercise is a much safer treatment(治疗)．

1.From the passage we know that         .

2.Active children        than inactive children．

3.Why are the bones of old people easy to break according to the passage?

4.The passage tells people that       .

高三英语阅读理解困难题查看答案及解析

听下面一段独白，回答以下小题。

1.What made the man decide to study medicine finally?

A. His own experience.　　 B. His teachers’ advice.　　 C. His parents’ influence.

2.What did the man do when he saw a woman on the ground?

A. Took her to the hospital.

B. Walked back to his dormitory.

C. Gave her mouth-to-mouth breathing.

3.Where does the conversation most probably take place?

A. In a university.　　 B. In a television studio.　　 C. In an emergency room.

4.What is Dr. Joseph going to talk about?

A. First aid methods.　　 B. Some happier moments.　　 C. His work in the hospital.

高三英语长对话困难题查看答案及解析

The job is not very rewarding ________ money, but he is getting valuable experience from it.

A. in terms of             B. in favor of

C. in case of                    D. in charge of

高三英语单项填空简单题查看答案及解析

From my point of view, the theory that ______ by the scientist is not quite scientific.

高三英语单项填空中等难度题查看答案及解析

Every day we experience one of the wonders of the world around us without even realizing it. It is not the amazing complexity of television, nor the impressive technology of transport. The universal wonder we share and experience is our ability to make noise without mouths, and so transmit ideas and thoughts to each other’s minds. This ability comes so naturally that we tend to forget what a miracle (奇迹) it is.

Obviously, the ability to talk is something that marks humans off from animal. Of course, some animals have powers just as amazing, Birds can fly thousands miles by \observing positions of the stars in the sky in relation to the time of day and year. In Nature’s talent show, humans are a species of animal that have developed their own special act. If we reduce it to basic terms, it’s an ability for communicating information to others, by varying sounds we make as we breathe out.

Not that we don’t have other powers of communication. Our facial expressions convey our emotions, such as anger, or joy, or disappointment. The way we hold our heads can indicate to others whether we are happy or sad. This is so-called “body language”. Bristling (直立的) fur is an unmistakable warning of attack among many animals. Similarly, the bowed head or drooping tail shows a readiness to take second place in any animal gathering.

Such a means of communication is a basic mechanism that animals, including human beings, instinctively acquire and display. Is the ability to speak just another sort of instinct? If so, how did human beings acquire this amazing skills ? Biologist can readily indicate that particular area of our brain where speech mechanisms function, but this doesn’t tell us how that part of our bodies originated in our biological history.

1.According to the passage, the wonder we take for granted is         .

A. our ability to use language

B. the miracle of technology

C. the amazing power of nature

D. our ability to make noises with mouth

2.What feature of “body language” mentioned in the passage is common to both human an animals?

A. Lifting heads when sad.

B. Keeping long faces when angry.

C. Bristling hair when ready to attack.

D. Bowing heads when willing to obey.

3.What can be inferred from Paragraph 3?

A. Body language is unique to humans.

B. Animals express emotions just as humans do.

C. Humans have other powers of communication.

D. Humans are no different from animals to some degree.

4.This passage is mainly about           .

A. the development of body language.

B. the special role humans play in nature

C. the power to convey information to others

D. the difference between humans and animals in language use

高三英语阅读理解中等难度题查看答案及解析