问题 选择题

下列说法正确的个数有(  )

①同一底片印出来的不同尺寸的照片是相似的

②放电影时胶片上的图象和它映射到屏幕上的图象是相似的

③放大镜放大后的图形与原来的图形是相似的

④水平观看装在带有水的透明玻璃杯中的金鱼所组成的像与金鱼本身的像是相似的

A.1个

B.2个

C.3个

D.4个

答案

①同一底片印出来的不同尺寸的照片,形状相同,但大小不一定相同,符合相似性的定义,故正确;

②放电影时胶片上的图象和它映射到屏幕上的图象,形状相同,但大小不一定相同,符合相似性的定义,故正确;

③放大镜放大后的图形与原来的图形,形状相同,但大小不一定相同,符合相似性的定义,故正确;

④水平观看装在带有水的透明玻璃杯中的金鱼所组成的像与金鱼本身的像,形状相同,但大小不一定相同,符合相似性的定义,故正确.

故选D.

阅读理解

阅读理解。

     Kitty, my daughter, has started high school. One day, her school coach encouraged her to join the

basketball team. Her first thought was that she would ask a friend to join the team with her. I told my

daughter that she needed to make her own decision. I didn't want her to miss some great chances in life

just because her friends were not doing it.

     My daughter and I always talk about her future, her hopes and her dreams. And I give myself enough

time to sit down and listen to what my daughter is saying.

      I'm always asking my daughter's opinions about important things. I think children see the same thing

s through different eyes. If you respect their opinions, they like to listen to and take your advice. Show

your children respect and they will learn to respect others. Remember that our children learn from us, and

you are your children's first teacher.

1. When the coach asked Kitty to join the basketball team, she first _____.

A. asked her mother for advice

B. refused to do it

C. wanted to join it with her friends

D. tried to make a decision by herself

2. What does the writer NOT do?

A. She gives her daughter some useful advice.

B. She discusses important things with her daughter.

C. She encourages her daughter to do things by herself.

D. She asks her daughter to follow her opinions.

3. The underlined word "respect" means"_____" in Chinese.

A. 服从

B. 尊重

C. 反对

D. 表达

4. What is the main idea of the passage?

A. Children should follow their parents' opinions at any time.

B. Children should express their opinions.

C. Parents should make all decisions for their children.

D. Parents should respect their children's opinions.

5. The writer plays many important roles in her daughter's life EXCEPT _____.

A. a mother

B. a listener

C. a teacher

D. a leader

单项选择题