问题 单项选择题

关于母线充电保护特点,不正确的是()。

A.为可靠切除被充电母线上的故障,专门设立母线充电保护;

B.为确保母线充电保护的可靠动作,尽量采用阻抗保护作为相间故障的保护;

C.母线充电保护仅在母线充电时投入,其余情况下应退出;

D.母线充电保护接线简单,在定值上可以保证高的灵敏度。

答案

参考答案:B

阅读理解

阅读理解。

     Learning to save money when you're young is an important lesson. All good lessons and habits begin

early, and saving is a skill that everyone needs. Many people-adults included-do not have a good sense of

saving for the long run.

     I have been lucky to learn this lesson early because I have had a grass-cutting business since I was 10

years old. Of the money I make, I spend about 10 percent and save the other 90.

     Making sure you save and don't spend too much is a good way to build up wealth. I have put my

earnings in a bank. Many teens I know spend all the money they earn, so it never has a chance to grow.

Young people should realize that their teenage years are a great time to begin saving.

     At high school, many parents pay for almost everything, so your expenses can be small. If you have a

job, you should have fun with some of the money. But you should also save some so that it will grow. Then

you can begin planning for your future. When you spend money, you not only lose that money, but also lose

the interest you should have earned by saving it.

     After high school, college is expensive and then "real" life begins, with expenses such as food and rent. If

you can hold onto a good percentage of the money you earn as a teen, going to college and buying a house

will be much easier. The earlier you begin saving, the more time the money has to grow. If you are in your

thirties without any savings, you will always have to struggle, The earlier you begin saving, the easier it is to

create a nest egg (储备金).

1. According to the author, a man can build up his wealth by _____.

A. finding a good job

B. saving money when he grows up

C. buying a house

D. saving money and spending less

2. The author seems to believe _____.

A. it is hard to save money when in high school

B. if you have a job, you needn't save money

C. when spending one loses more than the money he pays

D. going to college will be easier if you borrow money from the bank

3. What can be the best title for the passage?

A. Saving for future

B. Learning to spend less

C. How to save money

D. How to make money

填空题