试题与答案

一只小灯泡,标有“3V,0.6W”字样.现用图示的器材测量该小灯泡的伏安特性曲线

题型:实验题

题目:

一只小灯泡,标有“3V,0.6W”字样.现用图示的器材测量该小灯泡的伏安特性曲线,(滑动变阻器最大阻值为10;电源电动势为6V,内阻为l;电流表内阻为1,电压表的内阻为l0k).

(1)(2分)在设计电路的过程中,为了尽量减小实验误差,电流表应采用         (选填“内接”或“外接”)法.滑动变阻器的连接方式应采用       (选填“分压式”或“限流式”);

(2)(3分)用笔画线当导线,根据设计的电路图将实物图连成完整的电路(图中有三根导线已经接好).

答案:

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     Boys need friends, suffer when they don’t believe they have any, and worry over the ups and

downs of relationships. Many adults believe that somehow boys need friends less than girls do, in

truth, though, no boy is an island: boys value their friends throughout childhood and adolescence

and are happier and healthier when they have solid relationships with peers.

     Despite the common belief that girls are better at relationships, most boys consider their friends

a very important part of their lives, and boys may actually be better at keeping friendships than

girls are. A recent study of 10-to-15-year-old boys and girls found that girls’ friendships are

actually more fragile(脆弱的). Girls tend to say and do hurtful things to each other more

frequently than boys, and girls are more hurt by the end of a friendship.

     Boys are the living definition of the phrase “peer group”: they love games with rules, competition,

and doing things together. Boys seem to enjoy, even need the opportunity to test themselves

against others, and many lasting friendships begin in karate(空手道) class or on the basketball

court. Competence and skill are widely respected: being picked last for a team or left out altogether

is an experience that can haunt (萦绕心头) a boy for years.

     As boys mature, the friendship becomes even more important, and it frequently widens to include

girls. During the teen years, friends can become the most important part of a boy’s life ---and a

part in which his parents are not included. The confusion of being a teenager leads boys to form

close bonds with friends. There is the sense for many boys that a friend is someone who is “always

there for me”, someone he can trust. They may be partners in crime or partners in study, but the

friendship of adolescent boys can run surprisingly deep.

1.The common belief of adults is that boys ______.   

A. don’t care about others as much as girls    

B. don’t value friendships as much as girls

C. have the same friendship as girls          

D. have healthier friendship than girls  

2.According to the passage, ______.   

A. boys usually build friendships by playing competitive games

B. boys like to have small groups of friends

C. boys’ friendships seldom result in anyone being hurt

D. boys’ friendships can hardly end in failure  

3.The author mentions the study in Para. 2 to prove _______.   

A. girls value relationships more than boys

B. most boys consider their friends very important

C. boys may be better at keeping friendships than girls

D. boys may be more active in a friendship    

4.As a boy gets older, he tends to _______.   

A. widen his circle of friends to include his parents

B. shift his focus from his friends to himself

C. leave his parents out of his friends

D. be confused about what a friendship is  

5.What’s the best title of the passage?  _______

A. Friendships Between Boys and Girls        

B. Boys and Their Friendship

C. Childhood and Adolescent Friendship        

D. Tips on Making Friends with Boys

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