问题 单项选择题

解决常规X线摄片的数字化问题的核心部分是

A.三维信号的数字采集
B.二维信号的数字采集
C.三维信号的图像采集
D.二维信号的图像采集
E.三维信号的图像处理

答案

参考答案:B

解析:常规的X线摄影是X线对三维空间的被照体进行照射,获得载有被照体信息成分的强度不均匀的X线,再通过介质转换成二维的光强度分布。最终是否数字化图像决定介质是否形成数字化。

阅读理解

阅读理解。

     As we know, it is difficult for parents of every family to teach their children to be responsible (有责任的)

for housework.

     Shatian School in Shanghai is making its students do housework for their parents. Third graders must learn

how to cook and clean; sixth graders do the laundry, and seventh and eighth grader cook balanced meals with

15 yuan.

     Many parents think it's a good way for children to try housework, but they don't know how to do it at home.

With the following ideas, you can get your children to help at home.

     If you want to make your children think that they can do everything quite right, please give lots of praise

(鼓励) at home. Talk more about what he did right, not about what he didn't do. If your child finishes some

difficult work, give him or her a Sunday trip or a ball game as a reward.

1. Who should cook balanced meals with 15 yuan according to the passage?

A. A third grader.

B. A fourth grader.

C. A sixth grader.

D. A seventh grader.

2. What should parents do when the children do housework?

A.tell them when they are wrong.

B. Give them a lot of praise.

C. Don't let them do it.

D. Tell them not to do difficult work.

3. What's the meaning of the word "reward"?

A. 感恩

B. 说明

C. 诱惑

D. 奖励

4. From the passage we know that _____.

A. every student likes to do housework at home

B. there is no way to make children help do housework at home

C. doing housework is the students homework in Shatian School

D. No parents want their children to do homework

5. The title (题目) of the passage may be _____.

A. School and Housework

B. How to Teach Children

C. Housework

D. Make the Children Do Housework

单项选择题