问题 选择题
两个完全相同的电热器,分别通有如图所示的交变电流,则它们的功率之比为(   )

A.4:1

B.1:

C.2:1

D.:1

答案

答案:C

单项选择题
阅读理解

阅读理解

    A new guidebook says being_happy_is_just_like_being_fit-you need to practice the skills needed to get

this emotion,even during the darkest times.

    Roadtesting Happiness:How to be Happier  by Australian journalist and author Sophie  Scott is a

selfhelp book with a difference. " Being happy is something you need to focus on;it doesn't come as a

matter of course,"  Scott said."You always need to make an effort to be happy,even if you reach the point

of saying you are contented, you still need to keep focusing and  working on  the things  that made you

happy." Scott also said the book was born out of her interest in the human mind as well as how difficult she found it to cope after her mother died of cancer two years ago.

    "I was always interested in psychology,but a lot of happiness books don't address the fact that you can

be happy even if your life isn't going according to plan.The key is managing expectations." She says,"In the

book,I focused on what were the things most likely to make people happy,the ones with the most scientific evidence."  People should think that being happy is yet another task you have to do and then feel guilty

when you don't do it.Scott says the road to a positive outlook begins with very easy,small steps.

    "Women in particular today______________:they've got to be thin,got to have a career,got to have a

perfect relationship so the last thing you need is to be thinking you've got to be happy all the time,"  she

said."But it is important to improve your quality of life.Stop rushing around and filling each moment of the

day with things to do,and then sit down and think about your life and how you're feeling.The things I got

out of this were not things that take a lot of effort:feeling more grateful for the things you've got;adjusting

your reaction to situations and people.It's about changing small habits,more tinkering around the edges

instead of totally checking and changing your life."

1.By saying "being happy is just like being fit",the author probably means________.

A.people should practice how to remain happy

B.people should spend more time working out

C.keeping happy is the key to continuing our life

D.it's difficult for people to keep happy all the time

2.What should we do if we want to remain happy in Scott's opinion?

A.Do some scientific research into the skills of being happy.

B.Work hard to achieve your expectations.

C.Read more books about psychological activities.

D.Think that being happy is a very important task to do.

3.Which of the following would be proper to be filled in the blank?

A.get high expectation

B.feel overloaded

C.can't look after themselves well

D.have no friends to help them