皮皮学，免费搜题
登录
搜题
【多选题】
下列描述，正确的为A.
（1）照相物镜焦距的大小，决定了照片上的像和实际物体之间的比例尺。
B.
（2）照相物镜的相对孔径影响像面照度，照相物镜像面的照度和相对孔径的平方成比例。
C.
（3）照相物镜的视场角决定了被拍摄景物的范围。
D.
（4）照相物镜的焦距越短，视场角也就越小，短焦镜头，就是小视场的镜头，长焦距镜头就是大视场镜头。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】关于席勒以下说法错误的是()。
A.
他认为感性冲动就是审美冲动。
B.
他认为人都具有感性冲动和理性冲动。
C.
他提出了游戏冲动的说法。
D.
他认为在古希腊时期人的感性冲动和理性冲动是统一的。
【单选题】You are distracted because you have just remembered something important you have forgotten to say. You realize that people are looking at you, but you have no idea of what has just been said. Which of...
A.
I’d just like to add one more point that ….
B.
Sorry I forgot something important here, let me think for a while.
C.
Before we move to the next point, may I check your understanding of what I just said?
D.
Perhaps I didn’t make my points complete. There is another very important point I‘d like to illustrate.
【单选题】'Physicians who practice in a group reduce their own expenses and provide patients with a wider range of services.' in this sentence 'expenses' can be explained as ______.
A.
income
B.
spending
C.
time
D.
energy
【单选题】In those days, our ________ concern was to provide people who were stopped by the snowstorm with food and health care. [ ]
A.
normal
B.
constant
C.
permanent
D.
primary
【单选题】关于席勒以下说法错误的是()。 窗体顶端
A.
他认为感性冲动就是审美冲动。
B.
他认为人都具有感性冲动和理性冲动。
C.
他提出了游戏冲动的说法。
D.
他认为在古希腊时期人的感性冲动和理性冲动是统一的。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
