问题 单项选择题

下列关于扫描输入的说法错误的是( )。

A.速度快

B.精度高

C.会带入原图上的污迹、杂点

D.能自动分类、自动取舍

答案

参考答案:D

解析:[试题解析] 属性数据输入一般是键盘输入,特殊情况下可以扫描输入、语言输入、汉字手写输入;空间信息输入常用手工数字化仪输入和扫描器输入。扫描输入一般不能自动分类、自动取舍。

单项选择题
阅读理解

阅读理解。

     American Youth Millions of words have been written about young people in the United States. There are

reasons for this great interest in the ideas, feelings, and actions of youth.

     Today there are about seven million Americans in colleges and universities. Young persons under twenty-

five make up nearly half of the American population. Many of these will soon be in charge of the nation.

Naturally their ideas are important to everyone in the country, and it is necessary for older people to understand

what they think and feel.

     College students today have strong opinions about right and wrong. They are deeply interested in making a

better life for all people, especially for those who have not been given a fair chance before now. They see much

that is wrong in the lives of their parents. It is hard for them to see what is right and good in the older ways. As

a result, there is often trouble in American families. Your country may be meeting such problems, too.

1. The meaning of the underlined phrase "make up" is _____.

A. 编造

B. 构成

C. 补偿

D. 化妆

2. Which of the statements would the writer probably agree?

A. It is unfortunate that so much attention is being paid to young people in the United States.

B. Older people should try to understand the thoughts and feelings of youth.

C. Many problems today are caused by parents who do not control their children.

D. The young people of today are mainly interested in enjoying life.

3. The last sentence says, "Your country may be meeting such problems, too." The phrase "such problems" 

    refers most directly to _____.

A. crime caused by the use of drugs

B. the newer sexual freedom of youth

C. young people's dislike of hard work

D. disagreements between young people and their parents