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第二篇 TV Goes Digital Coming soon to your TV: views of the hottest live basketball plays from any seat in the stadium. What a better look at that three-point shot Call for a replay from behind the basket. Or better yet, follow the "view" of the ball as it goes through the net. While watching, you might use a built-in speakerphone to talk with a fan in the stands. Or send the score via e-mail to your father in Japan. Sounds impossible It won’t be when the computerized television industries combine to create digital TV-machines that receive, send, store, and manipulate TV programs the way computers now manipulate other data. Industry and government representatives recently reached an agreement on how this technology will take place. New digital TVs that allow current TVs to receive digital signals may hit stores by next spring. To understand how the digital revolution will change the way you watch TV it helps to know how TVs work now. Today, TV networks such as CBS and Fox broadcast TV shows as analogue electrical signals. These signals travel via the airwaves, satellites, or cable as a continuous stream of electromagnetic energy(like light and radio waves). But this system leaves a lot of room for error. The main problem is that interference can change the voltage of the signal as it travels. This may result in a distorted or miscolored picture. If we send out the signal in a form that is nearly free from interference-binary(两位数的)code, pictures and colors are not distorted. You’ll need to buy a new TV to receive these signals. And the new sets may cost 1,000 US dollars more than today’s TVs. But they’ll come with other benefits that may make the price worthwhile. For one thing, the screens will be wider, like movie screens. In addition, the color will be richer. And you’ll also get digital CD-quality sound. Besides these benefits, digital TVs can offer you a much wider choice of programs. Digital data can expand TV choices because computers can compress digital signals. Broadcasters will be able to send six times as much information on the same "channel". In paragraph 3,"may his stores" probably means ______.
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阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。 The Ice Age Twenty thousand years ago, the earth was held in control by relentlessly (不宽容地) probing fingers of ice that drew power from frigid strongholds in the north and crept southwestward to bury forests, fields, and mountains. Landscapes that were violated by the slowly moving glaciers(冰川)would carry the scars of this advance far into the future. Temperatures dropped deeply, and land surfaces in many parts of the world were depressed by the unrelenting weight of the thrusting ice. At the same time, so much was drawn from the oceans to form these huge glaciers that sea levels around the world fell by three hundred and fifty feet, and large areas of the continental shelf became dry land. This period of the Earth’s history had come to be called the Ice Age. In all, about eleven million square miles of land were covered with ice. The Ice Age terminated about fourteen thousand years ago when the ice sheets began to retreat. It took about seven thousand years for the ice to retreat to its present level. According to the passage, the glaciers moved from the north directly the the south.
下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题。第一篇 How Do American Consumers Borrow Young consumers often have not established their credit ratings. Many do not have steady incomes. They might have difficulty borrowing money from an agency in business to make loans. Parents or relatives are usually their best source of loans. Of course, the parents or relatives would have to have money available and be willing to lend it. You might even get an interest-free loan. However, a parent or relative who lends should receive the same interest as any other lender. There are disadvantages in borrowing from parents or relatives. One is that they may not insist on you paying back the money by a certain time. As a result, you might let the loan drag on. This is especially true if you are not required to pay interest. This is not a way to develop good credit habits. For most consumers, the cheapest place to borrow is at a commercial bank. Banks are a good source of installment loan which may run for 12 months or up to 30. Most banks also make single-payment loans to consumers for short periods—30,60,or 90 days. The newest type of bank loan is one that a depositor can get simply by writing a check. It is usually called something like "ready credit" or "reserved checking." It works like this. A depositor is given a limited amount of credit, usually between ＄500 and ＄1,000. He or she may write checks up to the amount allowed. Once a check has been written, the amount of the check becomes a loan. Usually no charge is made for interest until the loan is made. A typical interest rate is 3 cents per ＄100 per day, or just under 1 percent a month. Suppose that you used ＄100 of your credit and repaid it in 30 days. The cost would be 90 cents. If you repaid it in 10 days, the cost would be only 30 cents. The advantage of borrowing from a bank is that banks generally charge lower rates than most other lenders. One reason is that banks have more strict credit requirements than most other lenders. A consumer must have a fairly good credit rating to get a bank loan. Most commercial banks offer ______.
第二篇 TV Goes Digital Coming soon to your TV: views of the hottest live basketball plays from any seat in the stadium. What a better look at that three-point shot Call for a replay from behind the basket. Or better yet, follow the "view" of the ball as it goes through the net. While watching, you might use a built-in speakerphone to talk with a fan in the stands. Or send the score via e-mail to your father in Japan. Sounds impossible It won’t be when the computerized television industries combine to create digital TV-machines that receive, send, store, and manipulate TV programs the way computers now manipulate other data. Industry and government representatives recently reached an agreement on how this technology will take place. New digital TVs that allow current TVs to receive digital signals may hit stores by next spring. To understand how the digital revolution will change the way you watch TV it helps to know how TVs work now. Today, TV networks such as CBS and Fox broadcast TV shows as analogue electrical signals. These signals travel via the airwaves, satellites, or cable as a continuous stream of electromagnetic energy(like light and radio waves). But this system leaves a lot of room for error. The main problem is that interference can change the voltage of the signal as it travels. This may result in a distorted or miscolored picture. If we send out the signal in a form that is nearly free from interference-binary(两位数的)code, pictures and colors are not distorted. You’ll need to buy a new TV to receive these signals. And the new sets may cost 1,000 US dollars more than today’s TVs. But they’ll come with other benefits that may make the price worthwhile. For one thing, the screens will be wider, like movie screens. In addition, the color will be richer. And you’ll also get digital CD-quality sound. Besides these benefits, digital TVs can offer you a much wider choice of programs. Digital data can expand TV choices because computers can compress digital signals. Broadcasters will be able to send six times as much information on the same "channel". The last paragraph says that ______.
城市燃气管道一般以中压管道为主。低压管道和高压管道必须经过调压室调压后才能给工厂或民用用户供气。( )
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