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. We can learn from the passage that _ . A) some kids surveyed may go against their parents' rules B) kids talk less with their parents due to computers C) special home computers are being made by Symantec D) parents are too busy to pay attention to their kids
A
Time magazine named Russian President Vladimir Putin its "Person of the Year" for 2007 on Wednesday, saying he had returned his country from chaos to "the table of world power" though at a cost of democratic principles. He doesn't care about civil liberties; he doesn't care about free speech; he cares about stability. But Putin, 55, is enormously popular in Russia, presiding over a resurgent economy based on income from oil and natural gas. On the other hand, stability is what Russia needed and that's why Russians adore him. Time magazine said on its Web site that Putin, the son of a factory worker had led Russia with persistence, a sharp vision and a sense that he showed the spirit of "Mother Russia". The selection came days after Putin announced a plan to hold onto power after his term ends next year. Putin said on Monday that if his close ally ,Dmitry Medvedev, won the presidency, he would serve as Medvedev's prime minister. "Putin has put his country back on the map. And he intends to redraw it himself,"Time said. "He will continue to lead his country as its prime minister and attempt to transform it into a new kind of nation, beholden to neither East nor West." Time said the person of the year distinction, which it has awarded since 1927, is not an endorsement or a popularity prize but a recognition of the individuals and forces that shape the world. "At significant cost of, the principles and ideas that free nations prize, (Putin) has performed an extraordinary _ of leadership in placing stability on a nation that has rarely known it and brought Russia back to the table of world power. For that reason, Vladimir Putin is Time's 2007 Person of the Year," the magazine said. Time had earlier selected four other Kremlin leaders for the distinction: Stalin, who was chosen twice, Nikita Khrushchev, Yuri Andropov and Mikhail Gorbachev. What may be the best title of the passage? A) Putin-Time magazine's person of the year 2007 B) Putin-a world power leader C) Putin-a beloved Russian president D) Putin-an honorable Russian president
A
Q: The Winter Olympics is also called the White Olympics. At that time, many color1ful stamps are published to mark the great Games. The first stamp marking the opening of the White Olympics was issued on January 25th, 1932 in the United states to celebrate the 3rd White Olympics. From then on, issuing stamps during the White Olympics became a tradition. To observe the 4th Winter Olympic Games, a group of stamps were published in Germany in November, 1935. The five rings of the Olympics were printed on the front of the sportswear. It was the first time that the symbol appeared on stamps of the Winter Olympics. In the 1950s, the stamps of this kind became more color1ful. When the White Olympics came, the host countries as well as the non-host countries published stamps to mark those Games. China also published four stamps in February, 1980, when the Chinese sportsmen began to march into the area of the Winter Olympics. Japan is the only Asian country that has ever held the White Olympics. Altogether 14,500 million stamps were sold to raise funds for the sports meet. Different kinds of sports were represented on these small stamps. People can enjoy the beauty of the wonderful movements of the athletes. In the 1950s, when the White Olympics came, _ published stamps. A) not only the host countries but also the non-host countries B) all the host countries but the non-host countries C) all the countries that took part in the Games D) all the host countries and the non-host countries
A: A
Annealing is a way of making metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly , for example by dipping it in water , it will be very hard but also very brittle ---that is , It will break easily. Metal that has been annealed is soft but does not break as easily . It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly , for a certain length of time. The longer the heated metal takes to cool slowly , the softer it becomes . Annealing can also be used on other materials, such as glass. As suggested by the text , how can glass be made less brittle ? _ A) It can be heated and then cooled quickly B) It can be cooled and then heated slowly C) It can be heated and then cooled slowly D) It can be cooled and then heated quickly
C