单项选择题：上提直升机的桨距杆，可使发动机功率（） A.增大 B.减小 C.不变

题型：单项选择题

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．