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 come 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（傳播信號.The signal is bigger than normal because it carries more electronic information.

1. What is the main difference between an HD-TV and a normal television?  It is        .

A．the picture        B．the shape         C．the voice          D．the weight

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

3. How many lines does an HD-TV have?

A．Over 250                             B．More than 500

C．More than 1,000                        D．About 250

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 compact disc player.     

D. Both A and B.

 

【答案】

  

1.A

2.D

3.C

4.D

【解析】

試題分析：本文介紹了一種新型的電視HD-TV的特點和具體的數(shù)據(jù)。

1.A 細節(jié)題。根據(jù)文章第一段2,3行The main difference between an HD-TV and a normal television is the picture.說明最大的差別在于圖片，故A正確。

2.D 細節(jié)題。根據(jù)第一段5,6,7,8行Every color television picture contains thousands of red, green and blue points. They all come 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.說明AB兩項都是彩電的特點，故D項正確。

3.C 細節(jié)題。根據(jù)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.可知一般的彩電是5萬多條線，而HD-TV是其兩倍，也就是1萬多條，故C正確。

4.D 細節(jié)題。根據(jù)第一段倒數(shù)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兩項都是正確的。故D正確。

考點：考查科普類短文閱讀

點評：本文介紹了一種新型的電視HD-TV的特點和具體的數(shù)據(jù)。考查科普類短文閱讀，此類文章的最大的障礙是詞匯以及考生對閱讀內(nèi)容的不熟悉，需要考生在閱讀的時候有足夠的耐心。要養(yǎng)成在上下文串聯(lián)中猜測詞義的能力，根據(jù)上下文中出現(xiàn)的同義詞，近義詞，反義詞，以及詞義的解釋來理解生詞。同時要抓住文章的中心，不要受其他信息的影響。要根據(jù)題目及選項以及文章的上下文串聯(lián)合理的判斷推理。

 

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