问题 综合

读列车时刻表,回答下列问题:

(1)从北京到上海的K13次、K21次列车,途中各需_______小时_______分钟、_______小时_______分

    钟。

(2)如乘火车从上海到北京,希望第二天上午10时前到达,应乘_______次列车。

(3)如果从上海到北京要在徐州下车,应乘_______次列车。

答案

(1)15小时8分     15小时8分

(2)K14

(3)462

阅读理解

A serious problem for today’s society is who should be responsible for our elderly and how to improve their lives. It is not only a financial problem but also a question of the system we want for our society. I would like to suggest several possible solutions to this problem.

First, employers should take the responsibility for their retried employees. To make this possible,  a percentage of profits should be set aside for this purpose. But when a company must  take life long responsibility for its employees, it may suffer from a commercial disadvantage due to higher employee costs.

Another way of solving the problem is to return the responsibility to the individual. This means each person must save during his working years to pay for his years of retirement. This does not seem a very fair model since some people have enough trouble paying for their daily life without trying to earn extra to cover their retirement years. This means the government might have to step in to care for the poor.

In addition, the government could take responsibility for the care of the elderly. This could be financed through government taxes to increase the level of pensions. Furthermore, some institutions should be created for senior citizens, which can help provide a comfortable life for them. Unfortunately , as the present situation in our country shows, this is not a truly viable  answer. The government can seldom afford to care for the elderly, particularly when it is busy trying to care for the young.

One further solution is that the government or social organizations establish some workplaces especially for the elderly where they are independent.

To sum up, all these options have advantages and disadvantages. Therefore, it is reasonable to expect that some combination of these options may be needed to provide the care we hope to give to our elderly generations.

小题1:What is the passage mainly about?

A.The problem faced by the old in society.

B.Why we should take responsibility for the old.

C.How we can improve the lives of the old

D.Where the old can go to get their pensions.小题2:According to the passage, how can the government help to improve the lives of retired people?

A.Set aside some profits to help people with problems after they retire

B.Increase saving levels of people during their working years

C.Increase the discounts for food and transport for the old

D.Make available pensions for those who have retired小题3:The underlined word “viable” most probably means ____.

A.impossible

B.practical

C.usefull

D.successful小题4:What can be concluded from the passage?

A.Taking care of the old is mainly an issue of money

B.Employers should allow their workers to retire at a later age

C.Becoming independent should be the goal of most old people

D.There is no single solution to the problem of the old小题5:What is the writer’s main purpose of writing this article?

A.To point out the need for government supporting for old people

B.To make general readers aware of the problems of retired people

C.To discuss some possible solutions to an important social problem

D.To instruct retired people on how they can have a happier life.

问答题

(1)在“验证机械能守恒定律”的实验中,打点计时器接在电压为E,频率为f,的交流电源上,在实验中打下一条理想纸带,如图1所示,选取纸带上打出的连续5个点A、B、C、D、E,测出A点距起始点的距离为s0,点AC间的距离为s1,点CE间的距离为s2,已知重锤的质量为m,当地的重力加速度为g,则:

①从起始点O到打下C点的过程中,重锤重力势能的减少量为△EP=______,重锤动能的增加量为△EK______.

②根据题中提供的条件,可求出重锤实际下落的加速度a=______,它和当地的重力加速度g进行比较,则a______g(填大于,等于,小于).

(2)如图2给出器材为:电源E(电动势为12V,内阻不计),木板N(板上从下往上依次叠放白纸、复写纸、导电纸各一张),两个金属条A、B(平行放置在导电纸上,与导电纸接触良好,用作电极),滑线变阻器R(其总阻值小于两平行电极间导电纸的电阻),直流电压表

(量程为6V,内阻很大,其负接线柱与B极相连,正接线柱与探针P相连),开关K.现要用图中仪器描绘两平行金属条AB间电场中的等势线.AB间的电压要求取为6V.

(Ⅰ)在图2中连线,画成实验电路原理图.

(Ⅱ)下面是主要的实验操作步骤,将所缺的内容填写在横线上方.

a.接好实验电路.

b.______.

c.合上K,并将探针P与A相接触.

d.______.

e.用探针压印的方法把A、B的位置标记在白纸上.画一线段连接AB两极,在连线上选取间距大致相等的5个点作为基准点,用探针把它们的位置印在白纸上.

f.将探针与某一基准点相接触,______,这一点是此基准的等势点.用探针把这一点的位置也压印在白纸上.用相同的方法找出此基准点的其它等势点.

g.重复步骤f,找出其它4个基准点的等势点.取出白纸画出各条等势线.

(3)如图3是多用表的刻度盘,当选用量程为50mA的电流档测量电流时,表针指于图示位置,则所测电流为______mA;若选用倍率为“×100”的电阻档测电阻时,表针也指示在图示同一位置,则所测电阻的阻值为______Ω.如果要用此多用表测量一个约2.0×104Ω的电阻,为了使测量比较精确,应选的欧姆档是______(选填“×10”、“×100”或“×1K”).换档结束后,实验操作上首先要进行的步骤是______.