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高中英语人教版必修五Unit 2 The United Kingdom同步练习 (3)
It is said that farmers or peasants, especially those in developing countries, are often criticized for cutting down forests. But a new study suggests that many farmers recognize the value of keeping trees.
Researchers using satellite images found at least ten percent trees cover on more than one billion hectares of farmland. Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.
The study found the most trees cover in South America. North Africa and West Asia have the least.
The study found that climate conditions alone could not explain the amount of trees cover in different areas.There are areas with few trees but also few people, and areas with many trees and many people. The findings suggest that things like land rights, markets or government policies can influence tree planting and protection.
Dennis Garrity heads the World Agroforestry Center.The problem, he says, is that policy makers and planners have been slow to recognize this and to support such efforts.
The satellite images may not show what the farmers are using the trees for, but trees provide nuts, fruit, wood and other products.Even under drought (干旱) conditions, trees can often provide food and a way to earn money until the next growing season.
Some trees act as natural fertilizers. They take nitrogen (氮气) out of the air and put it in the soil. Scientists at the Center say the use of fertilizer trees can reduce the need for chemical nitrogen by up to three-fourths. Trees also capture carbon dioxide, a gas linked to climate change.
A. Nor could the size of nearby populations, meaning people and trees can live together.
B. He says farmers are acting on their own to protect and plant trees.
C. Almost all of it is covered by trees.
D. They also help prevent soil loss and protect water supplies.
E. He devotes most of his time to making people realize its importance.
F. That is nearly half of the farmland in the world.
G. Next comes Africa south of the Sahara, followed by Southeast Asia.
Do you want to take time to get in touch with yourself, your feelings, your dreams, and a good, healthy life? Here are some tips:
{#blank#}1{#/blank#} Sometimes it seems as if our culture has begun to view the need for sleep as a sign of weakness. But your body was genetically(基因地) programmed to spend a third of its life on sleep, and this affects thinking, memory, growth, your immune(免疫的) system and even your weight.
Begin the day in thankfulness. {#blank#}2{#/blank#} Name each person and hold them in your thoughts. The sense of thankfulness you experience will set a peaceful tone for the entire day, and reduce a day's stress that can lead to sleeplessness that night.
Strike a balance. {#blank#}3{#/blank#} Think about tai chi, prayer, yoga(瑜伽)—any daily activity that allows you to develop a peaceful center and a sense of balance.
Play with friends. The "tend and be friend studies", as they are called, conducted by UCLA researcher, Shelly Taylor, Ph.D. indicate that when women are stressed, they tend to their children and play with other women. {#blank#}4{#/blank#}
Use guided imagination. {#blank#}5{#/blank#} The tone of your voice, pacing, music, and pictures will persuade your nervous system that it's time to calm down.
A. Admit the importance of sleep. B. The images of things make the brain see and think about other things. C. Emotions are the basis of good communications and healthy relationships. D. Calming down a stressed nervous system will encourage a balanced life. E. Take 10 minutes every morning to give thanks to everyone in your life. F. Recent research has also linked the importance of sleep to behavior. G. Studies reveal(揭示) that women who have healthy relationships with their children and friends actually sleep better. |
Identity theft is one of the fastest-growing crimes. Identity theft is a crime in which your personal information is stolen by someone and is used in an illegal way. When your identity is stolen, the thief often does fraud with that. He may get a credit card in your name and spend it carelessly without paying the bills; {#blank#}1{#/blank#} and you have to be responsible for the traffic accidents he causes.
Why is identity theft becoming so common? {#blank#}2{#/blank#} And the wealth of personal details people post on social networks such as Facebook also makes it easier for identity thieves to obtain personal information.
Many people are not aware of the problems caused by this crime. They wake up from their carefree attitude only when they become a victim and suffer the damages caused by this crime.
{#blank#}3{#/blank#} and this is why it is important that every person should become cautious when using the Internet. The following tips may prevent you from identity theft.
First, make sure your computer has an updated anti-virus and firewall system installed. Second, only enter your credit card details on secure sites, or websites that you've used before. Third, {#blank#}4{#/blank#} Your date of birth, names of schools attended, phone number or the names of your parents are often required to verify an identity, and thieves can use this information too. Fourth, avoid sharing files as this gives other people access to your hard drive. Fifth, never open suspicious e-mails from unknown source. Last but not least, create complex passwords using a combination of numbers and keyboard symbols and {#blank#}5{#/blank#}
A. The popularity of the Internet and computers provides a gateway for the identity theft. B. Avoid giving away too much personal information on social networking sites. C. There is one solution to the problem. D. He may get a driver's license in your name. E. Change your passwords on a regular basis. F. There is no cure for identity theft except prevention. G. He may borrow money from the bank in your name. |
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