It seems that many parents have a lot to learn about what their children are doing online. According to a recent survey by the Symantec Corporation, which makes many kinds of security software for home and business computers, there's a "significant digital divide between parents and their kids." Parents of children under the age of 18 were asked to estimate how much time their kids spent online each week. The parents said about three hours a week on average. The kids - ages 8 to 17 - who took the survey said they're spending an average of seven hours online each week. "I really think that's due to the time they spend on their mobile phones and computers, when their parents don't even know they're online," says Symantec's Bill Rosenkrantz. "Remember, cell phones, PDAs and video game machines all make it possible to access the Internet. You don't have to sit in front of a computer screen." And what are the kids doing on the Web? "They're doing things like downloading music, they're going to social networking sites, they're actually shopping online when parents don't think they're doing those kinds of activities," says Rosenkrantz. "They're also, we think, doing some things with research papers and other kinds of activities with homework maybe where they're getting content online and they really shouldn't be." Nearly a quarter of the kids (23 percent) admit to doing things their parents would not approve. So how does a modern parent deal with this type of situation? "The first thing we strongly recommend is that parents spend time with their children online," Rosenkrantz says. "Sit down with them and understand what they're doing. Secondly, have a dialog about it. Have a dialog about what's an acceptable activity, what's an unacceptable activity, and set some ground rules -- time online, things you can and can't do. Really have those conversations. That's the most important." There are a lot of bad people on the Internet. That's why it's so important for parents to know what their kids are doing online. What's the purpose of the passage? A) To advertise a new security software. B) To give a short introduction to a survey. C) To warn children of the danger online. D) To give reasons for kid's Internet addiction.
B
Against the supposition that forest fires in Alaska, Canada and Siberia warm the climate, scientists have discovered that cooling may occur in areas where burnt trees allow more snow to mirror more sunlight into space. This finding suggests that taking steps to prevent northern forest fires to limit the release of greenhouse gases may warm the climate in northern regions. Usually large fires destroyed forests in these areas over the past decade. Scientists predict that with climate warming, fires may occur more frequently over the next several centuries as a result of a longer fire season. Sunlight taken in by the earth tends to cause warming, while heat mirrored back into space tends to cause cooling. This is the first study to analyze all aspects of how northern fires influence climate. Earlier studies by other scientists have suggested that fire in northern regions speed up climate warming because greenhouse gases from burning trees and plants are released into the atmosphere and thus trap heat. Scientists found that right after the fire, large amounts of greenhouse gases entered the atmosphere and caused warming. Ozone levels increased, and ash from the fire fell on far-off sea ice, darkening the surface and causing more radiation from the sun to be taken in. The following spring, however, the land within the area of the fire was brighter than before the fire, because fewer trees covered the ground. Snow on the ground mirrored more sunlight back into space, leading to cooling. "We need to find out all possible ways to reduce the growth of greenhouse gases in the atmosphere." Scientists tracked the change in the amount of radiation entering and leaving the climate system as a result of the fire, and found a measurement closely related to the global air temperature. Typically, fire in northern regions occurs in the same area every 80 to 150 years. Scientists, however, found that when fire occurs more frequently, more radiation is lost from the earth and cooling results. Specifically, they determined when... .The following are all the immediate effects after a forest fire EXCEPT _ . A) large amounts of greenhouse gases enter the atmosphere B) the levels of ozone which is a type of oxygen increase C) snow on the ground mirrors more sunlight back into space D) ashes from the fire fall on the ice surface and take in more radiation from the sun
C
Q: LEEDS, England--- A Leeds University psychology professor is teaching a course to help dozens of Bristons forgive their enemies. "The hatred we hold within us is a cancer," Professor Ken Hart said, adding that holding in anger can lead to problems such as high blood pressure and heart disease. More than seventy people have become members in Hart's first 20-week workshop in London--- a course he says is the first of its kind in the world. These are people who are sick and tired of living with a memory. They realize their bitterness is a poison they think they can pour out, but they end up drinking it themselves, said Canadian- born Hart. The students meet in groups of eight to ten for a two-hour workshop with an adviser every fortnight. The course, ending in July, is expected to get rid of the cancer of hate in these people. "People have lots of the attitudes towards forgiveness," he said. "People confuse forgiveness with forgetting. Forgiveness means changing from a negative attitude to a positive one." Hart and his team have created instructions to provide the training needed. "The main idea is to give you guidelines on how to look at various kinds of angers and how they affect you, and how to change your attitudes towards the person you're angry with," said Norman Claringbull, a senior expert on the forgiveness project. Hart said he believes forgiveness is a skill that can be taught, as these people "want to get free of the past." The author wrote this passage in order to _ . A) persuade people to go to Hart's course B) tell us the news about Hart's workshop C) tell us how to run a workshop like Hart's D) help us to look at various kinds of anger
A: B
(Q).
We have met the enemy, and he is ours. We bought him at a pet shop. When monkey-pox, a disease usually found in the African rain forest, suddenly turns up in children in the American Midwest, it's hard not to wonder if the disease that comes from foreign animals is homing in on human beings. "Most of the infections we think of as human infections started in other animals, " says Stephen Morse, director of the Center for Public Health Preparedness at Columbia University. It's not just that we're going to where the animals are, we're also bringing them closer to us. Popular foreign pets have brought a whole new disease to this country. A strange illness killed Isaksen's pets, and she now thinks that keeping foreign pets is a bad idea. "I don't think it's fair to have them as pets when we have such a limited knowledge of them," says Isaksen. "Laws allowing these animals to be brought in from deep forest areas without stricter control need changing," says Peter Schantz. Monkey-pox may be Researchers believe infected animals may infect their owners. We know very little about these new diseases. A new bug may be kind at first. But some strains may become harmful. Monkey-pox doesn't look a major infectious disease. But it is not impossible to pass the disease from person to person. We learn from Paragraph 1 that the pet sold at the shop may _ . A) come from Columbia B) enjoy being with children C) prevent us from being infected D) suffer from monkey-pox
(A).
D