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Why is it a problem if all the smaller fish species die？ A. It's not healthy for the

Why is it a problem if all the smaller fish species die？

A. It's not healthy for the environment.

B. People only like to catch big fish.

C. There are too many small fish.

D. The smaller fish can get lost in the lake.

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发布时间：2022-12-03

更多“Why is it a problem if all the smaller fish species die？ A. It's not healthy for the”相关的问题

第1题

Why is lead poisoning a new problem for condors？A．Hunters shoot condors.B．Puppet rearing p

Why is lead poisoning a new problem for condors？

A．Hunters shoot condors.

B．Puppet rearing practices have caused it.

C．Hunter's bullets contain lead which poisons the meat condors eat.

D．They never used to like lead.

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第2题

Why is it a problem if all the smaller fish species die？A．It's not healthy for the environ

Why is it a problem if all the smaller fish species die？

A．It's not healthy for the environment.

B．People only like to catch big fish.

C．There are too many small fish.

D．The smaller fish can get lost in the lake.

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第3题

People do not analyze every problem they meet. Sometimes they try to remember a soluti

on from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other times they begin to act without thinking. They try to find a solution by trial and error. However, when all these methods fail, the person with a problem has to start analyzing. There are six stages in analyzing a problem.

First the person must recognize that there is a problem. For example, Sam’s bicycle is broken, and he cannot read it to class as he usually does. Sam must see that there is a problem with his bicycle.

Next the thinker must define the problem. Before Sam can repair his bicycle, he must find out the reason why it does not work. For instance, he must determine if the problem is with the gears, the brakes, or the frame. He must make his problem more specific.

Now the person must look for information that will make the problem clearer and lead to possible solutions. For instance, suppose Sam decided that his bike does not work because there is something wrong with the gear wheels. At this time, he can look in his bicycle repair book and read about gears. He can talk to his friends at the bike shop. He can look at his gears carefully.

After studying the problem, the person should have several suggestions for a possible solution. Take Sam as an illustration. His suggestions might be: put oil on the gear wheels; buy new gear wheels and replace the old ones; tighten or loosen the gear wheels.

Eventually one suggestion seems to be the solution to the problem. Sometimes the final idea comes very suddenly because the thinker suddenly sees something new or sees something in a new way. Sam, for example, suddenly sees that there is a piece of chewing gum between the gear wheels. He immediately realizes the solution to his problem: he must clean the gear wheels.

Finally the solution is tested. Sam cleans the gear wheels and finds that afterwards his bicycle works perfectly. In short, he has solved the problem.

26.What is the best title for this passage？

A.Six Stages for Repairing Sam’s Bicycle

B.Possible Ways to Problem-solving

C.Necessities of Problem Analysis

D.Suggestions for Analyzing a Problem

27.In analyzing a problem we should do all the following except __________.

A.recognize and define the problem

B.look for information to make the problem clearer

C.have suggestions for a possible solution

D.find a solution by trial or mistake

28.By referring to Sam’s broken bicycle, the author intends to _________.

A.illustrate the ways to repair his bicycle

B.discuss the problems of his bicycle

C.tell us how to solve a problem

D.show us how to analyze a problem

29.Which of the following is NOT true？

A.People do not analyze the problem they meet.

B.People often accept the opinions or ideas of other people.

C.People may learn from their past experience.

D.People can not solve some problems they meet.

30.As used in the last sentence, the phrase “in short” means _________.

A.in the long run

B.in detail

C.in a word

D.in the end

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第4题

In the year 2100, the world is going to have a population of about 8 billion. Most scienti

sts agree that the most severe problem is food supply. Who is going to feed all these people？ Where is the food going to come from？ Are we going to have enough food？ Are we going to produce more artificial foods？ One way of improving the situation is for people to eat less meat. Why？ Because it takes 4 kilos of grain protein(蛋白质)to produce half a kilo of meat protein. Clearly, there is not going to be sufficient meat protein for 8 billion people. Therefore, it will also be necessary to change eating habits because meat is the main part of many people s food today. A possible solution to this latter problem is the soybean(大豆). The soybean plant produces beans which have a very high fat and protein content. Scientists can now make these look and taste like real meat. They can also make many other artificial products such as soybean milk, for example, which has a taste of milk and can be used in cooking in very much the same ways as cow s milk. In fact, one woman in the United States fed her family only on soybeans for a year! She gave them soybean beef, soybean chicken, soybean milk, and sometimes just soybeans. Possibly, we are all going to eat soybeans in the future and finally give up meat completely from our tables.

What is the main subject of the passage？

A．A solution to man"s food problem.

B．A solution to the population problem.

C．Advantages of soybean.

D．How to develop good eating habits.

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第5题

Elizabeth Blackwell was born in England in 1821, and moved to New York City when she w

as ten years old. One day she decided that she wanted to become a doctor. That was nearly impossible for a woman in the middle of the nineteenth century. After writing many letters asking for admission to medical schools, she was finally accepted by a doctor in Philadelphia. She was so determined that she taught school and gave music lessons to get money for the cost of schooling.

In 1849, after graduation from medical school, she decided to further her education in Paris. She wanted to be a surgeon(外科医师), but a serious eye problem forced her to give up the idea.

Upon returning to the United States, she found it difficult to start her own practice because she was a woman. By 1857 Elizabeth and her sister, also a doctor, along with another woman doctor, managed to open a new hospital, the first for women and children Besides being the first woman physician and founding her own hospital , she also set up the first medical school for women.

(1) Why couldn’t Elizabeth Blackwell realize her dream of becoming a surgeon？

A.She couldn’t get admitted to medical school.

B.She decided to further her education in Paris.

C.A serious eye problem stopped her.

D.It was difficult for her to start a practice in the United States.

(2) What main obstacle almost destroyed Elizabeth’s chances for becoming for a doctor？

A.She was a woman.

B.She wrote too many letters.

C.She couldn’t graduate from medical school.

D.She couldn’t set up her hospital.

(3) How many years passed between her graduation from medical school and the opening of her hospital？

A.Eight years B.Ten years

C.Nineteen years D.Thirty-six years

(4) According to the passage, all of the following are “firsts” in the life of Elizabeth Blackwell,

A.became the first woman physician.

B.was the first woman doctor.

C.and several other women founded the first hospital for women and children.

D.set up the first medical school for women.

(5) Elizabeth Blackwell spent most of her lift in_______.

A.England

B.Paris

C.the United States

D.New York City

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第6题

Do you find it very difficult and painful to get up in the morning? This might be call

Do you find it very difficult and painful to get up in the morning？ This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy cycle.

During the hours when your labor through your work you may say that you’re “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. No one has discovered why this is so, but it leads to such familiar monologues as: “Get up, Peter! You’ll be late for work again!” The possible explanation to the trouble is that Peter is at his temperature-and-energy peak in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.

You can’t change your energy cycle, but you can learn to make your life fit if better. Habit can help, Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late anyway. Counteract your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning, but you have an important to do early in the day, rise before your usual hour. This won’t change your cycle, but you’ll get up steam and work better at your low point.

Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the troublesome search for clean clothes by laying them out the night before. Whenever possible, do routine work in the afternoon and save requiring more energy or concentration for your sharper hours.

21.If a person finds getting up early a problem, most probably ________.

A.he is a lazy person.

B.he refuses to follow his own energy cycle.

C.he is not sure when his energy is low.

D.he is at his peak in the afternoon or evening.

22.Which of the following may lead to family quarrels according to the passage？

A.Unawareness of energy cycles.

B.Familiar monologues.

C.A change in a family member’s energy cycle.

D.Attempts to control the energy cycle of other family members.

23.If one wants to work efficiently at his low point in the morning, he should __________.

A.change his energy cycle