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Both television and home video are(compare) ______ recent inventions．
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更多“Both television and home video are（compare) ______ recent inventions．”相关的问题
______television has both advantages and disadvantages is clear.
A．What
B．If
C．That
D．Which
According to the author, it is in the public interest to______.
A．broadcast only popular television programs
B．cater to the needs of all the people
C．broadcast both Westerns and symphonies
D．entertain people only
A、Sophia made her Carnegie Hallpiano debut at 14.
B、Lulu led a prominent youth orchestra.
C、Both girls are humorless robots with terrible dress sense.
D、Both girls are never allowed to watch television, play computer games or go to sleepovers.
A.Using an oral footnote and citing the materials in the written representation of the speech.
B.Including printed sources only in oral footnotes or written documentation; interviews or television shows need not be cited.
C.Plagiarizing the source in both the oral and written forms of the speech.
D.Adding a bibliography; it is not necessary to state the sources if you have a typed bibliography to give the teacher or coordinator of the event at which you are speaking.
The Television Camera
The television camera is rather like the human eye. Both the eye and the camera have a lens, and both produce a picture on a screen. In each case the picture is made up of millions of spots of light.
Let us see how the eye works. When we look at an object-a person, a house, or whatever it may be, we do not see all the details of the object in one piece. We imagine that we do, but this is not the case. In fact, the eye builds up the picture for us in our brain, which controls our sight, in millions of separate parts, and although we do not realize it, all these details are seen separately. This is what happens when we look at something. Beams of light of different degrees of intensity, re-fleeted from all parts of the object, strike the lens of the eye. The lens then gathers together the spots of light from these beams and focuses them on to a light-sensitive plate-the retina-at the back of the eyeball. In this way, an image of the object is produced on the retina in the form. of a pattern of lights. The retina contains millions of minute light-sensitive elements, each of which is separately connected to the brain by a tiny fiber in the optic nerve. These nerve fibers, working independently, pick out minute details from the image on the retina and torn the small spots of light into nerve impulses of different strengths. They then transmit these impulses to the brain. They do this all at the same time. All the details of the image are fed to the brain, and as we have taught our brain to add them together correctly, we see a clear picture of the object as a whole.
Television, which means vision at a distance, operates on a similar principle. A television picture is built up in thousands of separate parts. Beams of light reflect from the subject being televised strike the lens of the television camera, which corresponds to the lens of the eye. The camera lens gathers together the spots of light from these beams and focuses an image of the subject on to a plate, the surface of which is coated with millions of photo-electric elements sensitive to light. The spots of light forming the image on the plate cannot be transmitted as light. So they are temporarily converted by an electronic device into millions of electrical impulses ; that is, into charges of electricity. These electrical impulses are then sent through space on a wireless wave to the homes of the viewers. They are picked up by the aerials and conveyed to the receivers to the television set. There, they are finally converted back into the spots of light that make up the picture on the television screen.
We are told that the television resembles the human eye in______.
A．one way
B．two ways
C．three ways
D．four ways
Lack of sleep can lead to ______.
A．a sudden change in lifestyle
B．good bodily condition
C．the habit of falling asleep in front of the television
D．a quick drop in both physical and mental condition
Sometimes there are power cuts and we have no electricity in the house. This does not worry us as we just light candles and carry on with what we were doing before. Our friends are lost—no television! So they don't know what to do. On such evening our house is very full as they all come to us. They all have a good time. Instead of sitting in silence in front of the television, everybody talks and plays games. Yes, life is possible without television.
The author's friends like______.
A．sitting and playing chess in the evening
B．attending classes in the evening
C．listening to music in the evening
D．watching television in the evening
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