某同学在“测量小灯泡电阻”的实验中,设计了如图甲所示的电路图.小灯泡上标有“2.

题型:实验题

问题:

某同学在“测量小灯泡电阻”的实验中,设计了如图甲所示的电路图.小灯泡上标有“2.5V  0.3A”字样,电源电压为3V.

请完成下列回答.

(1)根据电路图,在图乙中用笔画线代替导线连接实物图.

(2)某次测量,电流表与电压表的示数如图所示,计算此时小灯泡灯丝的电阻值为_________.

考点:电路的连接伏安法测电阻电流的测量,电流表的使用及读数方法电压的测量,电压表的使用
题型:实验题

广告文案通常包括()()()()四大部分。

题型:实验题

阅读理解。

     While surfing television channels over the weekend,a scene from a family classic of last year portraying

the now-so-familiar sorry state of retired parents being ill-treated by their children and families caught my

attention. I wondered why the description of this relationship had not changed much over the many years!

Even though the same movies and soaps accurately capture several other social changes around us-from

value systems to new found economic freedom to the importance of technology and the changing approach

to consumerism (消费主义)-are these creative efforts far from the truth in telling us that an average retiree

is still struggling?

     Look around and you will agree that the post-retired lifestyle for an ex-salaried class people is often a pale

shadow of their last working years. Even self employed people, who have handed over the responsibility to

the next generation, are no exception. Did the average middle class not save enough through his working

years?

     Socially, we already know that the Indians are taught the benefits of start saving early on in life. Household

savings data supports this social behavior-India has the highest rates of savings among various economies and

is far ahead of the west. Yet, tragically, a lifetime of savings does not seem to provide enough for a

comfortable retirement!

     A closer look at the pattern of what we do with our financial savings may tell us a bit more. Over half of

households' financial savings is put into a "safe" deposit, followed by large portions in insurance, pension,

provident funds (福利基金) and the rest in physical currency. Less than a tenth goes into "risky" assets (资产)

like stocks. While there might be nothing, in particular, worrisome in this investment pool, one has to consider

inflation (通货膨胀). The real value of savings, over a few decades, may actually be lower than the starting

point.

1. What had not changed much over the many years according to the passage?

A. Value systems

B. The poor situation of retirees

C. Economic freedom

D. Approach to consumerism

2. Which of the following statements about saving in India is right?

A. the concept of saving has been well received by Indians.

B. the amount of the savings ranks number one across the world.

C. long-standing savings can help the retirees live a care-free life.

D. saving early can not benefit people at all.

3. What's the best title of the text?

A. Retirees being treated unfairly

B. Is saving enough

C. Saving in India

D. How to deal with saving

4. What can be inferred according to the last paragraph?

A. Half of the financial savings in stocks can be accepted.

B. The real value of saving must be lowered in a few years.

C. A loss of savings may hardly be avoided.

D. Inflation can be avoided on condition that you consume instead of saving.

题型:实验题

蒸汽锅炉运行中,要定期(),根据运行记录内容认真填写锅炉运行日志。

A.计算

B.检查

C.记录

D.抄表

题型:实验题

液面形状为直角三角形的液舱,其自由液面惯性矩的计算公式为()。

A.1/12λb*b*b

B.1/16λb*b*b

C.1/36λb*b*b

D.1/48λb*b*b

题型:实验题

科学的宏观调控,有效的政府治理,是发挥社会主义市场经济体制优势的()

A.根本

B.基础

C.制度保障

D.内在要求

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