问题 应用设计题

(6分)(一)按照题目要求作图:

(1)如甲图所示,a、b分别为一束入射光线和一束出射光线。请画出a经过凹透镜后的折射光线和与b对应的入射光线。

(2)在乙图中,标出电源的正极,并用箭头表示磁感线方向。

(3)请将图丁中所示元件,连接成符合安全用电要求的家庭电路。

答案

题目分析:(1)a光线的延长线通过另一侧的虚焦点,则对应的出射光线平行于主光轴,b光线经过光心,对应的入射光线也经过光心,且方向与b一致。两条光线都要标上箭头表示光的传播方向。

(2)电磁铁的左端是N极,根据安培定则,电源的右端是正极,左端是负极。磁体外部磁感线的方向是从N极出发,回到S极,然后在磁感线上标出对应的箭头。

(3)家庭电路中,三脚插座,“左零右火中接地”,开关与它控制的灯泡串联,灯泡连在零线上,开关接在火线上。

阅读理解

阅读理解

     Wilma was born on June 23,1940 in St Bethlehem, Tennesse.By the time she was 6, Wilma Rudolph

was given metal braces (支架) to aid her in walking.She started receiving treatment with help from her

family.A few years later, she walked without any assistance into the church.

     When she was in junior high, she joined the basketball team.She finally made an appeal to compete in

games again and when her wish was finally permitted, she amazed everyone by leading the team to an

undefeated season and the state championships.Though they lost the championship title in the end,

Wilma Rudolph earned the attention of the women's track coach, Ed Template at Tennessee State

University and was invited to join the"Tigerbelles". Her efforts paid off as she turned out to be so good

that the Tigerbelles invited her to join them in the national Olympic team trails.Not only did she make it

into the team, but she won a bronze medal in the 4?100 m relay at the 1956 Melbourne Olympics.Four

years later, Rudolph set a world 200 m record (22.9 seconds)at the 1960 US Championships.At the

Rome Olympics in 1960, she competed in the 100 m,200 m and 4?100 m relay, and equaled the world

record of 11.3 seconds in the semifinals (半决赛) of the 100 m. She won the final by three metres in

11.0 seconds, but it was not accepted as a world record.

     Wilma Rudolph's extraordinary achievements in Rome made her a darling of the European press who

gave her the nickname "The Black Gazelle (羚羊)"and "The Black Pearl". She also became the first

woman in American history to win 3 gold medals in the Olympics and was crowned "the Fastest Woman

in the World", Wilma Rudolph's spirit inspired people such as Jackie Joyner Kersee and Florence Griffith

Joyner who became the next woman to win 3 gold medals.

1. What problem did Wilma face according to Paragraph 1?

A. Not being able to speak.  

B. Not being able to walk.

C. Losing her sight.  

D. Losing her hearing.

2. According to the passage, Wilma could join the "Tigerbelles" mainly because of________.

A. her being Ed Template's favourite athlete

B. her strong appeal to Ed Template

C. her winning the championship title

D. her outstanding performances in basketball games

3. We learn that Wilma broke the world record in________.

A. the 4 ?100 m relay at the 1956 Melbourne Olympics

B. the semifinals of the 100 m at the Rome Olympics

C. the 200 m at the 1960 US Championships

D. the final of the 100 m at the Rome Olympics

4. How many people that at least won 3 Olympics gold medals inAmerican history are mentioned in

   the passage?

A. One.  

B. Three.  

C. Four.  

D. Five.

5. According to the last paragraph, Wilma's two nicknames and one title show that she had________.

A. speed, grace and beauty

B. swiftness, grace and misfortune

C. speed, kindness and responsibility

D. kindness, perseverance and beauty

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