问题 单项选择题 A3/A4型题

如果构成图像的像素数量少、像素的尺寸大,可观察到的原始图像细节较少,图像的空间分辨率低;反之,像素数量多,图像的空间分辨率高。描述一幅图像需要的像素数量是由每个像素的大小和整个图像的尺寸决定的。在空间分辨率一定的条件下,图像大比图像小需要的像素多,每个单独像素的大小决定图像空间分辨率。若图像矩阵大小固定,视野增加时,图像空间分辨率降低。灰度级数影响着数字图像的密度分辨率。计算机处理和存储数字图像采用的是二进制数,ADC将连续变化的灰度值转化为一系列离散的整数灰度值,量化后的整数灰度值又称为灰度级(graylevel)或灰阶(grayscale)。量化后灰度级的数量由2决定,N是二进制数的位数,称为位(bit),用来表示每个像素的灰度精度。

12位(bit)的成像系统能提供的灰度级数为()

A.256

B.512

C.1024

D.2048

E.4096

答案

参考答案:E

阅读理解

第II卷

注意事项:

1. 用黑色墨水的钢笔或签字笔将答案写在答题纸上。2. 本卷共6小题,共35分。

第三部分:写作

第一节   阅读表达(共5小题;每小题2分,满分10分)

阅读下面短文,并根据题目要求用英语回答问题(请注意问题后的字数要求)。

Several years ago, while attending a communication course, I experienced a most unusual process. The instructor asked us to list anything in our past that we felt ashamed of, regretted or incomplete about and read our lists aloud.

This seemed like a very private process, but there’s always some brave soul in the crowd who will volunteer. The instructor then suggested that we find ways to make an apology to people, or take some action to right any wrong doings. I was seriously wondering how this could ever improve my communication.

Then the man next to me raised his hand and volunteered this story: “Making my list, I remembered an incident from high school. I grew up in a small town. There was a Sheriff that none of us kids liked. One night, my two buddies and I decided to play a trick on him.

After drinking a few beers, we climbed the tall water tank in the middle of the town, and wrote on the tank in bright red paint: Sheriff Brown is an s.o.b. (畜生). The next day, almost the whole town saw our glorious sign. Within two hours, Sheriff Brown had us in his office. My friends told the truth but I lied. No one ever found out.”

“Nearly 20 years later, Sheriff Brown’s name appears on my list. I didn’t even know if he was still alive. Last weekend, I dialed the information in my hometown and found there was a Roger Brown still listed. I tried his number. After a few rings, I heard, “Hello?” I said, “Sheriff Brown?” paused. “Yes.” “Well, this is Jimmy Calkins.”

“And I want you to know that I did it?”Paused. “I knew it!” he yelled back. We had a good laugh and a lively discussion. His closing words were: “Jimmy, I always felt bad for you because your buddies got it off their chest, but you were carrying it around all these years. I want to thank you for calling me for your sake.”

Jimmy inspired me to clear up all 101 items on my list within two years, and I always remember what I learned from the course: It’s never too late to right the past wrongdoings.

56. What was the uneasy part of communication course about for the writer?

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57. Please explain the underlined word “buddies” in English. 

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58. Please state one of your wrongdoings and how to right it.  

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59. Why did Sheriff Brown pause twice before he could carry on the telephone conversation?

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60. What does the writer learn from the course?

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多项选择题