问题 多项选择题

在我国残疾社会工作中,改善社会环境包括()。

A、建设无障碍环境

B、社会理解与互助

C、助残日

D、规定残疾人假期

答案

参考答案:A, B, C

探究题

小刚在“自制测力计”的实践活动中,想知道橡皮筋伸长与所受拉力的关系,于是他取了原长l0=5cm的一条橡皮筋做实验,记录数据如下表所示。

请你分析表中数据并填空:

F2:F1=2:1, (l2一l0):(l1一l0)=2:1;

F3:F1=3:1, (l3一l0):(l1一l0) =3:1;

F4:F1=4:1, (l4-l0):(l1-l0)=_________;

F4:F2=________, (l4-l0):(l2一l0)=2:1;

F5:F4=5:4, (l5一l0):(l4一l0)=___________

由此可得出结论:在一定范围内,橡皮筋两次的伸长之比______________(选填“等于”或“不等于”)橡皮筋两次所受拉力之比。

(2)小刚在假期一次野外学习考察中,在湖边发现了一小块矿石,他身边带有以下器材:刻度尺、橡皮筋、细线、饮水杯、标有20g的一块糖果,请你帮助他利用身边的器材设计实验,测量小矿石的质量。写出实验步骤,并用字母表示测量出的物理量。

实验步骤:________________________________________________________________________

用已知量和测量出的物理量表示出小矿石的质量m=________________________

(3)他想测量小矿石的密度,请你帮助他利用身边的器材进一步设计实验,并用字母表示出实验步骤中要测量出的物理量。

实验步骤:_______________________________________________________________________________

用已知量和测量出的物理量表示出小矿石的密度ρ=___________________________

阅读理解

In Western countries people have been using the installment plan since the first half of the twentieth century. Today, a large number of families in Great Britain buy furniture, household goods and cars by installments. In the U. S., the figure is much higher than in Great Britain, and people there spend over 10 percent of their income on the installment plan.

The price of an article bought on installments is always higher than the price that would be paid by cash. There is a charge for interest. The buyer pays one quarter or one third of the price as a down payment when the goods are delivered to him. He then makes regular payments, weekly or monthly, until the full price is paid up. The legal ownership of the goods remains with the seller until the final payment has been made.

Installment buying has advantages and disadvantages. It can help couples with small incomes to furnish their homes and start housekeeping. It increases the demand for goods, and in this way helps business and employment. There is, however, the danger that when business is bad, installment buying may end suddenly, making business much worse. This may result in a great increase in unemployment. If the people on the installment plan lose their jobs, they will probably not be able to make their payments. If great numbers of people are not able to pay their installment debts there is a possibility that businessmen cannot collect their debts and will therefore lose money. If businessmen lose money or fail to make a satisfactory profit, it becomes more likely to have a depression. This is why, in some countries, the government controls the installment plan by fixing the amount of the down payment and installments to discourage people from buying more than they can pay for on the installment plan.

56. Which of the following is NOT true about the installment plan?

A. A lot of British families use the installment plan.

B. More than 10 percent American families buy things on installments.

C. Americans depend more on installment than British people do.

D. Americans spend one tenth of their income on installment buying.

57. Goods bought on installments are more expensive than goods bought by cash because ______.

A. the buyer has to pay extra money as interest

B. the delivery of the goods charges extra money

C. the buyer has to pay a down payment

D. the service offered by installment plan charged extra money

58. What will happen to a buyer if he fails to make the full payment for an item bought on installments?

A. He might lose his job.

B. He will stop owning the item he has bought.

C. He will have to sell what he has bought.

D. He will go into debt.

59. The advantage of installment buying might include all the following EXCEPT that ________.

A. purchasing power is strengthened

B. employment might be increased

C. people develop a good habit of saving money

D. young couples are able to furnish their homes

60. In some countries, the governments control the installment plan to ________.

A. increase employment

B. avoid depressions

C. ensure that businesses make good profits

D. ensure that people can pay for what hey buy