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【单选题】
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
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【单选题】毛泽东在《论十大关系》的报告中指出社会主义文化建设的新方针是 ( )
A.
大鸣大放
B.
百花齐放,百家争鸣
C.
推陈出新
D.
古为今用,洋为中用
【简答题】在插入排序、希尔排序、选择排序、快速排序、堆排序、归并排序和基数排序中,平均比较次数最少的是 ,需要内存容量最多的是 。
【简答题】如果需要输入大量的信息,就需要用到______标记。通过textarea控件可以轻松地创建多行文本输入框。______和______为该标记的必须属性,其中前者用来定义多行文本输入框每行中的字符数,后者用来定义多行文本输入框显示的行数,他们的取值均为。
【单选题】孙先生,58岁。原因不明腹部包块1个月。触及肝肋下4cm,剑突下6cm,边缘厚薄不一,表面高低不平,质硬如石,触痛阳性。首先考虑
A.
肝硬化
B.
肝瘀血
C.
急性肝炎
D.
肝脓肿
E.
原发性肝癌
【单选题】心电图检查对下列哪种疾病具有决定性诊断意义
A.
房、室肥大
B.
电解质紊乱和药物中毒
C.
心肌缺血和心肌损伤
D.
心律失常和急性心肌梗塞
【单选题】被称为标准早餐、健康式早餐的是( ) 。
A.
欧陆式早餐
B.
美式早餐
C.
英式早餐
D.
日式早餐
【简答题】在插入排序、希尔排序、选择排序、快速排序、堆排序、归并排序和基数排序中,平均比较次数最少的排序是___________需要内存容量最多的是______________。
【单选题】毛泽东在《论十大关系》的重要讲话中指出,社会主义建设的基本方针是
A.
实行“统筹兼顾,适当安排”的方针
B.
百花齐放、百家争鸣的方针
C.
把国内外一切积极因素调动起来为社会主义事业服务
D.
调整、巩固、充实、提高的方针
【判断题】在日常生活中,我们会感受到很多的喜、怒、哀、乐,这些情绪体验都是正常的。
A.
正确
B.
错误
【简答题】在在插入排序、希尔排序、选择排序、快速排序、堆排序、归并排序和基数排序中,平均比较次数最少的排序是____,需要内存容量最多的是____。
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