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Keeping Cut Flowers
1、While everybody enjoys fresh cut flowers around their 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.
2、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.
3、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 （二氧化碳）, called respiration （呼吸）, generates the energy the flower needs to give the flower its shape and color. 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.
4、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.
5、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 （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.
1、Paragraph 2__________.
2、Paragraph 3__________.
3、Paragraph 4__________.
4、Paragraph 5__________.
A、Control of Respiration
B、Beauty of Fresh Cut Flowers
C、Role of Respiration
D、Most Important Aspect of Flower Care
E、Need for Clean Water
F、Ways of Stopping Respiration
5、A few simple facts will help you keep cut flowers__________.
6、Respiration plays a key role__________.
7、The aging of cut flowers can be slowed down__________.
8、Another important way to prolong the life of cut flowers is__________.
A、by keeping its original shape and color
B、in the life of cut flowers
C、to produce carbon dioxide
D、for as long as possible
E、by controlling temperature
F、to replace the water and solution every day
【参考答案】1. D 2. C 3. A 4. E 5. D 6. B 7. E 8. F
　Successful Language Learners
Some people seem to have a knack for learning languages. They can pick up new vocabulary， master rules or grammar， and learn to write in the new language more quickly than others. They do not seem to be any more intelligent than others， so what makes language learning so much easier for them？ Perhaps if we take a close look at these successful language learners， we may discover a few of the techniques which make language learning easier for them.
First of all， successful language learners are independent learners. They do not depend on the book or the teacher； they discover their own way to learn the language. Instead of waiting for the teacher to explain， they try to find the patterns and the rules for themselves. They are good guessers who look for clues and form their own conclusions. When they guess wrong， they guess again. They try to learn from mistakes.
Successful language learning is active learning. Therefore， successful learners do not wait for a chance to use the language； they look for such a chance. They find people who speak the language and they ask these people to correct them when they make a mistake. They will try anything to communicate. They are not afraid to repeat what they hear or to say strange things； they are willing to make mistakes and try again. When communication is difficult， they can accept information that is inexact or incomplete. It is more important for them to learn to think in the language than to know the meaning of every word.
Finally， successful language learners are learners with a purpose. They want to learn the language because they are interested in the language and the people who speak it. It is necessary for them to learn the language in order to communicate with these people and to learn from them. They find it easy to practice using the language regularly because they want to learn with www.Kao8.cc it.
What kind of language learner are you？ If you are a successful language learner， you have probably been learning independently， actively， and purposefully. On the other hand， if your language learning has been less than successful， you might as well try some of the techniques outlined above.
1、Paragraph 1__________
2、Paragraph 2__________
3、Paragraph 3__________
4、Paragraph 4__________
A、Ways to Learn a Language Successfully
B、Learning a language Purposefully
C、Learning a Language Actively
D、Learning a Language Independently
E、Learning from Mistakes
F、Learning to Think in the Target Language
5、Successful language learners derive conclusions___________
6、Independent Language learners rely on themselves___________
7、Active language learners seize every opportunity______________
8、The author wrote this text_________________
A. to discover sentence patterns and grammatical rules
B. to expand vocabulary
C. to use the target language
D. to encourage unsuccessful language learners to learn independently， actively and purposefully
E. from clues
F. to say strange things
KEY：ADCBEACD