社会学产生的科学条件是（）A、人类社会有了较大发展 B、自然科学的发展已取得许多重大成

在所示的电路中，电阻R=2.0Ω，电源的内电阻r=1.0Ω，不计电流表的内阻．闭合开关S后，电流表的示数I=0.5A，则电源的电动势E等于（　　）

A．1.0 V

B．1.5 V

C．2.0 V

D．3.0 V

根据《中华人民共和国招标投标法》，招标投标活动应当遵循的原则是（）。

A．公平、公正、公开、实事求是

B．公开、公平、公正、诚实信用

C．公平、公正、科学、择优

D．公平、公正、公开、科学、择优

It is said that usually people learn from their experiences and the mistakes they make throughout their lives. This is correct because life teaches us what is correct to do and what is not.

Let’s consider a mistake that one has made while trying to learn to drive. It is true that, for a beginner, it is common to make mistakes, but after doing something wrong once, twice or three times, it is quite impossible to make the same mistake a fourth time. Everyone tries their best in order to improve their skills and they will be very pleased to notice that these improvements really happen.

On the other hand, being successful in everything he does, one cannot know what failure means. He would always see only the best side of things and it would be difficult for him to face the difficulties to come in the future. Here we can mention the case of a very successful football player, who has known what fame (名声) is from the very beginning of his career. We have to admit that most of his luck originates from the great talent that he was born with. But some fellow players can also work to achieve the same thing because they make mistakes in their games and they learn from each mistake that they make.

In the end, we can say that one needs to make mistakes in life in order to better appreciate things. And at the same time, mistakes teach us how important it is to fight for something we wish for in life. Of course, moments of happiness will come in return when we see the changes or improvements.

小题1:The author mentions learning driving in the second paragraph to ______________.

A．make a comparison

B．explain that learning is a slow process

C．show that driving is a very difficult skill

D．prove that success results from failure小题2:What is the author’s attitude towards someone that is always successful at something?

A．He thinks they are lucky.

B．He is bored with them.

C．He wants to learn from them.

D．He believes their success is a bad thing.小题3:Which of the following best describes the organization of the passage?

A．

B．

C．

D．

债券具有票面价值，代表了一定的财产价值，是一种（）。

A．真实资本 

B．虚拟资本 

C．财产直接支配权利 

D．实物直接支配权利

财务分析中（）既是债权人贷款决策的依据，也是投资人确定融资方案的依据。

A．盈利能力分析结论

B．投资能力分析结论

C．偿债能力分析结论

D．资本金盈利分析结论