Text 3
Most growing plants contain much more water than all other materials combined. C. R. Bames has suggested that it is .as proper to term the plant a water structure as to call a house composed mainly of brick a brick building. Certainly it is that all essential processes of plant growth and development occur in water. The mineral elements from the soil that are usable by the plant must be dissolved in the. soil solution before they can be taken into the root. They are carried to all parts of the growing plants and are built into essential plant materials while in a dissolved state.
The carbon dioxide (CO2) from the air may enter the leaf as a gas but is dissolved in water in the leaf before it is combined with a part of the water to form simple sugars -- the base material from which the plant body is mainly built. Actively growing plant parts are generally 75 to 90 percent water. Structural parts of plants, such as wood
A. a plant efficiently utilizes most of the water it absorbs
B. carbon dioxide is the essential substance needed for plant development
C. a plant needs more water than is found in its composition
D. the stronger the wind, the more the water vapor loss'
Michele Langlois is a young Canadian who works for the police as a handwriting expert. She has helped catch many criminals (罪犯) by using her special skill.
When she was only fourteen, Michele was already so interested in the differences in her school friends’ handwriting that she would spend hours studying them. After finishing college she went to France for a special two-year class to learn how to analyze (分析) handwriting at the School of Police Science. On her return, she began her work for the Quebec police.
Michele says that it is impossible for people to disguise (伪装) their handwriting. She can discover most of what she needs to know simply by looking at the writing with her own eyes, but she also has machines that help her analyze different kinds of paper and ink. This knowledge is often of help to the police.
Michele also believes that handwriting is a good sign of the kind of person the writer is. "I wouldn’t go out with a fellow i
A. Michele’s job
B. William’s handwriting
C. Michele’s analyzing skill
D. William’s love for Michele
A great many articles and books discussing environmental and resource problems begin with the proposition that there is an environmental and resource crisis. If this means that the situation of humanity is worse now than in the past, then the idea of a crisis-and all that follows from it-is dead wrong. In almost every respect important to humanity, the trends have been improving, not deteriorating.
Our world now supports 5.6 billion people. In the nineteenth century, the earth could sustain only 1 billion. And 10,000 years ago, only 1 million people could keep themselves alive. People are now living more healthily than ever before.
One would expect lovers of humanity-people who hate war and worry about famine in Africa-to jump with joy at this extraordinary triumph of the human mind and human organization over the raw forces of nature. 41．______
It is amazing but true that a resource shortage resulting from population or income growth usually leaves us bet
1年期1亿美元贷款 1年期相当于2亿美元的欧元贷款
我来回答:
