题干

下列结论正确的是(   )

A:﹣4与+(﹣4)互为相反数

B:0的相反数是0

C:﹣ 2332 互为相反数

D:﹣ 54 本身是相反数

上一题 下一题 0.0难度 选择题 更新时间:2017-02-19 03:46:17

答案(点此获取答案解析)

B

同类题4

阅读理解

    Failure is probably the most exhausting experience a person ever has.There is nothing more tiring than not succeeding.

    We experience this tiredness in two ways: as start-up fatigue(疲惫) and performance fatigue.In the former case, we keep putting off a task because it has either too boring or too difficult.And the longer we delay it, the more tired we feel.

    Such start-up fatigue is very real, even if not actually physical,not something in our muscles and bones.The solution is obvious though perhaps not easy to apply: always handle the most difficult job first.

    Years ago,I was asked to write 102 essays on the great ideas of some famous authors.Applying my own rule,I determined to write them in alphabetical(按字母顺序),never letting myself leave out a tough idea.And I always started the day's work with the difficult task of essay-writing.Experience proved that the rule works.

    Performance fatigue is more difficult to handle.Though willing to get started, we cannot seem to do the job right. Its difficulties appear so great that, however hard we work, we fail again and again.In such a situation,I work as hard as I can-then let the unconscious take over.

    When planning Encyclopaedia Britannica (《大英百科全书》),I had to create a table of contents based on the topics of its articles.Nothing like this had ever been done before,and day after day I kept coming up with solutions, but none of them worked.My fatigue became almost unbearable.

    One day, mentally exhausted, I wrote down all the reasons why this problem could not be solved.I tried to convince myself that the trouble was with the problem itself,not with me.Relived,I sat back in an easy chair and fell asleep.

    An hour later, I woke up suddenly with the solution clearly in mind.In the weeks that followed,the solution which had come up in my unconscious mind provided correct at every step.Though I worked as hard as before,I felt no fatigue.Success was now as exciting as failure had been depressing.

    Human beings, I believe must try to succeed.Success,then,means never feeling tired.

同类题5

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    As the saying goes, rose given, fragrance in hand. I am always in the 1 of giving money to every beggar or homeless person I pass by. My friends say it is not good to 2. We may come across beggars or homeless people begging every day and all beggars have their ability to survive. It 3 them that I never listen.

    On a 4 day, my friend and I were walking to the 5 when I passed a beggar lady. I had seen her several times before and had always given her a few 6. That day, I gave her 2 Euros. I was waiting for the bus and reading a book when I7 to see that lady standing in front of me. She 8 me a piece of paper covered in a plastic bag to prevent it from getting 9. She stood there, looking at me 10. Putting away my book, I took the paper, which 11 she and her family had to 12 their country because of floods, and she was 13 to support them. She had got a bit of money, but she needed 5 14 Euros to get home. I 15 in my pockets and found 20 cents. My friend 16 a 5 Euro note. I asked her to give it to the lady, and said that I would 17 the next day. When she got the money, the lady hugged us and said thanks again and again, and went on her way. Later on the bus, I wondered where her home was and 18 she had gotten to this country. In her story, I felt that my friend and I would always remain part of it as the 19, who helped her get home on a rainy day. But for me, helping a stranger did bring me happiness, giving me a pleasant 20.