问题
选择题
用照相机照相时，物体在胶卷上形成（ ）
A．缩小的倒立实像
B．放大的正立实像
C．缩小的正立实像
D．缩小的倒立虚像
答案
照相机的镜头相当于一个凸透镜，当照相时，物体离照相机镜头比较远，像是缩小、倒立的实像．
故选A．
搜题请搜索小程序“爱下问搜题”
用照相机照相时，物体在胶卷上形成（ ）
A．缩小的倒立实像
B．放大的正立实像
C．缩小的正立实像
D．缩小的倒立虚像
照相机的镜头相当于一个凸透镜，当照相时，物体离照相机镜头比较远，像是缩小、倒立的实像．
故选A．
| 完形填空。 | ||||
| Why do I want to go to college? No one has ever asked me 1 a question. But many times I have asked myself. I have 2 a whole variety of reasons. 3 important reason is that I want to be a better man. Many things make human beings different 4 or better than or even superior to animals. One of the most important things is 5 . If I fail to receive higher education, my education 6 . As I want to be a fully 7 man, I must get a well-rounded education, which good colleges and universities are supposed to 8 . I know one can get educated in many ways, but colleges and universities are 9 the best places to teach me how to educate myself. Only when I am well- educated, will I be a better human being and 10 fit into society. | ||||
|