ABCD请按实际情况填写。其他请参照下表填写。
A, B, C, D, E(AB), F(AC)
| A. Control of Respiration B. Basic tips for preserving cut flowers C. Role of Respiration D. Most Important Aspect of Flower Care E. Need for Clean Water F. Ways of Stopping Respiration |
While everybody enjoys fresh cut flowers around his house, few people know how to keep them for as long as possible. This may be done by keeping in mind a few simple facts. The key to keeping fresh cut flowers for a week or more without floral preservatives(which contain biocides that kill bacteria and fungus) is to keep the water fresh and the stems free of air pockets so they can continue to draw up water.
An important thing to remember about cut flowers is that they are sensitive to temperature. For example, studies have shown that cut carnations(康乃馨) retain their freshness eight times longer when kept at 12℃ than when kept at 26℃. Keeping freshly harvested flowers at the right temperatures is probably the most important aspect of flower care.
Flowers are not intended by nature to live very long. Their biological purpose is simply to attract birds or insects, such as bees, for pollination (授粉). After that, they quickly dry up and die. The process by which flowers consume oxygen and produce carbon dioxide, called respiration (呼吸), generates the energy the flower needs to give the flower its shape and colour. The making of seeds also depends on this energy. While all living things respire, flowers have a high level of respiration. A result of all this respiration is heat, and for flowers the level of heat relative to the mass of the flower is very high. Respiration also brings about the eventual death of the flower. Thus the greater the level of respiration, the sooner the flower dies.
How, then, to control the rate at which flowers die? By controlling respiration. How is respiration controlled? By controlling temperature. We know that respiration produces heat, but the reverse is also true. Thus by maintaining low temperatures, respiration is reduced and the cut flower will age more slowly.
Another vital factor in keeping cut flowers is the quality of the water in which they are placed. Flowers find it difficult to “drink” water that is dirty or otherwise polluted. Even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flowers. To rid the water of these unwanted substances, household chlorine bleach (含氯漂白剂) can be used in small quantities. It is recommended that 15 drops of chlorine bleach(at 4% solution) be added to each litre of water. The water and solution should also be replaced each day.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
To dry fish, you will need either a drying table or a place to hang them. If a table is used, it should have a top made of wire screen or thin pieces of wood with space between each piece. Do not let them touch each other. Be sure that air can flow around the fish from all sides, including the top and bottom.
Build a small smoky fire under the drying table for the first day to keep the flies away. After that, you can keep the flies away by covering the fish with a thin cloth.
Fish taste better if they are out of bright sunlight while they are being dried.Turn the fish over every other day. Small fish will dry in about three days if the air is dry.
After the fish have dried, place them in a basket.Then put the basket in a cool, dry place off the ground.
Make sure as much of the saltwater as possible is removed before you smoke the fish.
| A．For best results, put the drying table under a tree. |
| B．Cover them with clean paper or large leaves. |
| C．Lay the cleaned and salted fish, still wet, on the table. |
| D．Wood from fruit trees makes good fuel for your fire. |
E. Do not let the cloth touch the fish.
F. Dried fish must be kept completely dry until they are eaten.
G. Large fish will take a week or ten days to dry.
Homework is a bridge that joins schools and parents. For teachers, homework is an effective way to provide additional instruction through practice. ____. Through it, parents can observe their children’s education and express a positive attitude towards their children’s education. As children grow older, homework and the amount of time engaged in homework increase in importance.
Through practice and participation in learning tasks, homework can improve children’s achievement. Thus, it would be expected that if homework were completed accurately, not only would children’s general knowledge and grades improve but they would also increase mastery of basic study skills. ____.
Homework can provide other benefits. When children bring an assignment（功课）home, gather and organize necessary materials to complete the assignment, return the assignment and receive a grade, they strengthen their sense of responsibility. ___. When completing homework, they will plan how long they should spend on one subject.
____. When parents become involved in the homework that kids bring from school, they are given a chance to communicate with their kids on what is happening in their school lives. A lot can be learned by parents when they sit beside their kids as they do their homework.
Finally, although we often do not consider that homework serves a school administrative（管理的）role, it offers schools an opportunity to let parents know what their children are learning. ____. Homework can also fulfill an administrative role in helping schools achieve their overall job of improving students’ achievement.
For parents, homework serves as a window.
Meanwhile, they also improve their time management.
Reading, writing, spelling and mathematics are included.
Homework is actually a good way to improve family communication.
Thus, homework can play a role by keeping parents informed about class activities.
How to Be a Good Sport(开朗的人)
Learning to lose without losing your cool is a skill, like learning to ride a bike.______ and when you can handle losing; people will call you a good sport.
Why must we learn to lose gracefully(文雅地)?Here is the answer:
______But any time two teams or kids are facing each other in a game or contest, someone will lose (unless it’s a tie平局).Kids lose in small ways, like in a game of checkers(西洋跳棋),but they also might face losing in bigger ways, like when their team loses a championship(锦标赛) game.
______So it’s not surprising that kids don’t like it. Adults don’t like it either, but everyone can learn to control how they react to a loss. In other words, what should you do when you lose?
The most difficult thing is that sometimes you might react before you even realize it. For instance, your little league game comes to an end and, in a flash, the other team has won. ______Oh dear, you probably don’t want to be crying right now, even though it’s ok that you feel sad.
Kids who are good sports don’t freak out (表现失常)when they lose. _____Kids might not be as eager to play with someone who gets angry all the time and won’t ever give the other guy or girl a break.
| A．Everyone wants to win. |
| B．Losing is really a disappointing matter. |
| C．They are usually unpopular among young people. |
| D．They will become known as kids who are fun to play with. |
E. There they are celebrating on the field and yon burst into tears.
F. You might find it hard to do this at first, but over time it will get easier.
G.. Many people behave badly after losing a game, especially young people.
Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need.
| A. Factors that influence reactions to pollutants B. Possible sources of indoor air pollution C. Ways to identify diseases with similar symptoms D. Long-term effects after repeated exposure E. A commonly-ignored health threat F. Immediate symptoms and regular treatment |
Most people are aware that outdoor air pollution can damage their health, but many do not know that indoor air pollution can also have significant health effects. Environmental Protection Agency studies indicate that indoor levels of pollutants may be 2-5 times, and occasionally more than 100 times, higher than outdoor levels. These levels of indoor air pollutants may be of particular concern because most people spend about 90％ of their time indoors.
There are many sources of indoor air pollution in any home. These include combustion sources such as oil, gas, coal, wood, and tobacco products; building materials and furnishings as diverse as deteriorated asbestos-containing insulation, wet or damp carpet, and cabinetry or furniture made of certain pressed wood products; products for household cleaning and maintenance, personal care, or hobbies; central heating and cooling systems and humidification devices; and outdoor sources such as radon, pesticides, and outdoor air pollution.
Immediate effects may show up after a single exposure or repeated exposures. These include irritation of the eyes, nose, and throat, headaches, dizziness, and fatigue. Such immediate effects are usually short-term and treatable. Sometimes the treatment is simply eliminating the person's exposure to the source of the pollution, if it can be identified. Symptoms of some diseases, including asthma, hypersensitivity and fever, may also show up soon after exposure to some indoor air pollutants.
The likelihood of immediate reactions to indoor air pollutants depends on several factors. Age and pre-existing medical conditions are two important influences. In other cases, whether a person reacts to a pollutant depends on individual sensitivity, which varies tremendously from person to person. Some people can become sensitized to biological pollutants after repeated exposures, and it appears that some people can become sensitized to chemical pollutants as well.
Certain immediate effects are similar to those from colds or other viral diseases, so it is often difficult to determine if the symptoms are a result of exposure to indoor air pollution. For this reason, it is important to pay attention to the time and place the symptoms occur. If the symptoms fade or go away when a person is away from the home and return when the person returns, an effort should be made to identify indoor air sources that may be possible causes.
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（E= AB F=AC G=AD）
There was a park near my home. But I didn’t go there very often. Many people said there was nothing special. One afternoon I went into the park and found it was really small. I walked quickly because there wasn’t much to see. I walked for some time and found myself standing in front of two paths.I found that the two paths were different from each other.
The left one was wide and clean. There were lots of flowers on both sides of the path. Though the flowers weren’t very beautiful, they made me feel good. I decided to take this path. But wait! I looked at the right one. The path didn’t look nice. Grass grew everywhere. For a long time I couldn’t make up my mind.
It wasn’t nice , but I didn’t want to give up. At last, I came to the end of the path. Ah! There was a small garden there. It was beautiful, perhaps the most beautiful garden I had ever seen.
Many people told me that there was nothing much to see in the park. Now I’d like to tell them that if they had followed the right way, they would have felt differently. But when I told them about what I had seen in the park, they just smiled at me without saying a word. I knew they didn’t believe me. They couldn’t even remember that path because it was so small.Don’t be afraid to choose a different path. You may get a big surprise!
| A．There is nothing that I want to see. |
| B．It looked like it had not been cleaned for months. |
| C．After a while a strange feeling made me follow the dirty path. |
| D．“ Which way should I go?” I asked myself. I looked at one way, then the other. |
E. I told them what happened.
F. My trip to the park that day made me understand something about life.
G. There were trees, flowers and chairs. I thought it was the nicest part of the park.