问题
选择题
如今郑州的所有街口都安装了360°高清晰摄像头，由派出所实施24小时监控，来保护人民的安全。摄像机的像距几乎不变，但镜头的功能类似于人眼睛的晶状体，焦距可以调节。如图所示，某嫌犯在成像板上已经成清晰的像，镜头的焦点在F处（即C处），如果该人远离镜头，想监控此人，镜头的焦点将可能变在
A．a
B．b
C．c
D．d
答案
答案：D
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如今郑州的所有街口都安装了360°高清晰摄像头，由派出所实施24小时监控，来保护人民的安全。摄像机的像距几乎不变，但镜头的功能类似于人眼睛的晶状体，焦距可以调节。如图所示，某嫌犯在成像板上已经成清晰的像，镜头的焦点在F处（即C处），如果该人远离镜头，想监控此人，镜头的焦点将可能变在
A．a
B．b
C．c
D．d
答案：D
| 阅读理解. | ||||||
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| 1. If you want to watch a football game, the best program for you would be ______. | ||||||
| A. TV play B. Sports C. Around the world D. Talk show | ||||||
| 2. The program of ______ will let you know much about western (西方的) countries. | ||||||
| A. Sisters B. Around China C. Around the world D. On TV next week | ||||||
| 3. If you want to know something about tigers, elephants and monkeys, the best program for you is ______. | ||||||
| A. Around China B. Animal world C. TV play D. Foreign arts | ||||||
| 4. English classroom is a program that ______. | ||||||
| A. lets you know something about classroom B. tells you something about students C. tells you something about school life D. teaches you English | ||||||
| 5. The program at the end of Channel 2 means (意思是) ______ on TV next week. | ||||||
| A. news B. programs C. people D. places | ||||||