In the near future, people in some parts of the world will watch a new kind of television. It is called the high definition television or the HD-TV. The main difference between an HD-TV and a normal television is the picture. It is more clear and detailed. This is because the HD-TV has many more points and lines that make a television image. Every color television picture contains thousands of red, green and blue points. They all e together as an image in the eye of the person watching. The points are organized in lines that go across the television screen. There are more than five hundred lines in a normal television. The HD-TV has two times as many. To get this clear picture, you must have a big screen. Experts say people using a small screen will see little difference.
The HD-TV also has clear sound. It is like the sound on a CD. All these improvements make an HD-TV very costly. One kind in Japan now sells for more than twenty thousand dollars .A major problem with the HD-TV is its broadcast signal（传播信号.The signal is bigger than normal because it carries more electronic information.
【小题1】 What is the main difference between an HD-TV and a normal television? It is .A．the picture B．the shapeC．the voiceD．the weight【小题2】 What is a color TV image?A．It is made up of thousands of red, green, and blue points.B．Points are organized in lines that go across the TV screen.C．It is a black and white picture D．Both A and B【小题3】 How many lines does an HD-TV have?A．Over 250B．More than 500C．More than 1,000 D．About 250【小题4】 What should you do if you want to get a clear and detailed picture from an HD-TV?
A. You must have the bigger signal for the HD-TV.
B. You have to get a big screen.
C. You should have a pact disc player.
D. Both A and B.A
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(答案→)A
解析：本文介绍了一种新型的电视HD-TV的特点和具体的数据。
【小题1】A 细节题。根据文章第一段2,3行The main difference between an HD-TV and a normal television is the picture.说明最大的差别在于图片，故A正确。
【小题2】D 细节题。根据第一段5,6,7,8行Every color television picture contains thousands of red, green and blue points. They all e together as an image in the eye of the person watching. The points are organized in lines that go across the television screen. There are more than five hundred lines in a normal television.说明AB两项都是彩电的特点，故D项正确。
【小题3】C 细节题。根据第一段7,8行There are more than five hundred lines in a normal television. The HD-TV has two times as many.可知一般的彩电是5万多条线，而HD-TV是其两倍，也就是1万多条，故C正确。
【小题4】D 细节题。根据第一段倒数第二句To get this clear picture, you must have a big screen.
和第二段最后一句The signal is bigger than normal because it carries more electronic information.可知AB两项都是正确的。故D正确。