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科目:高中英语 来源: 题型:053
阅读理解。
In the near future some parts of the world may soon have a new kind of television. It is called high definition television or H-D-T-V. The main difference between H-D-T-V and normal television is the picture. It is more clear and detailed (明细). This is because H-D-T-V has many more points and lines that make a television image (图像). Every colour 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 500 lines in a normal television. H-D-T-V 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.
H-D-T-V also has clear sound. It is like the sound on a compact disc player (激光电唱机), or CD. All these improvements make H-D-T-V very costly. One kind in Japan now sells for more than 20 000 dollars. In the future, the cost is expected to be about 2 000 dollars. A major problem with H-D-T-V is its broadcast signal. The signal is bigger than for normal, because it carries more electronic in formation.
(1) The main difference between an H-D-T-V and a normal television is ________.
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A.that the picture of normal TV is normal
B.that H-D-T-V is new and good
C.that H-D-T-V is so new that not all parts of the world have got it at present
D.that the picture of an H-D-T-V is more clear and detailed
(2) A colour TV image is ________.
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A.made up of thousands of red, green and blue points
B.formed by the above-mentioned red, green and blue points which are organized in lines that go across the TV screen
C.a black-and-white picture
D.both A and B
(3) An H-D-T-V has ________ lines.
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(4) If you want to get a clear and detailed picture from an H-D-T-V, you ________.
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A.must have the bigger signal for H-D-T-V
B.have to get a big screen
C.should have a compact disc player
D.both A and B
(5) According to the passage, which of the following is right?
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A.The H-D-T-V sets are not popular now because they are too expensive for most people.
B.The signal for an H-D-T-V is not bigger than that for the normal TV.
C.In the future an H-D-T-V will cost 10 times as much as it costs now.
D.In the future an H-D-T-V will be cheaper only because 2 000 dollars will be just equal to 20 000 dollars.
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