950连续自然数中各位上数字有1的有多少个

950连续自然数中各位上数字有1的有多少个
950连续自然数中各位上数字有1的有多少个

950连续自然数中各位上数字有1的有多少个
0-99,有19个;
100-199,有100个;
200-299,有19个;
300-399,有19个;
400-499,有19个;
500-599,有19个;
600-699,有19个;
700-799,有19个;
800-899,有19个;
900-950,有14个;
总共有266个.

95

1.
Students need enough sports and activities to do physical exercises and relax, but in some schools they are not given enough time to do outside activities. It's harmful for students' growth. T...

全部展开

1.
Students need enough sports and activities to do physical exercises and relax, but in some schools they are not given enough time to do outside activities. It's harmful for students' growth. Teachers ask students to spend most of their time on studies. But when they feel tired and bored, students can't concentrate on studies. They are in bad health.
It's necessary to give students enough time to do outside activities. After good relaxation and rest, studens will work harder.
Pay attention to students' health and growth.
学生们需要足够的运动和活动来锻炼和放松，但是一些学校没有给予学生足够的时间从事课外活动，这对学生成长是有害的。老师为了让学生得高分，要求他们把大部分的时间放在功课上。但是当学生疲惫厌烦时，就不能集中精力学习。他们的身体也不好。
给予学生足够的时间从事课外活动是很必要的。休息好和放松后，学生会更加努力学习。
请关注学生的健康和成长。
2.
金钱是幸福之本?：
Directions: For this part, you are allowed 30 minutes to write a composition on the topic Can Money Buy Happiness?
You should write no less than 100 words and you should base your composition on the outline (given in Chinese) below:
1.有人认为金钱是幸福之本（source of happiness）
2.也有人认为金钱是万恶之源（root of all evil）
3.我的看法
Can Money Buy Happiness?
范文：
Can money buy happiness? Various people have various answers. Some people think that money is the source of happiness. With money, one can buy whatever he enjoys. With money, one can do whatever he likes. So, in their minds, money can bring comfort, security, and so on. Money, as they think, is the source of happiness.
But there are still a lot of others who think that money is the root of all evil. Money drives people to steal, to rob, and to break the law. A lot of people became criminals just because they were in search of money. And in the Western countries, there is nothing that can’t be bought by money. Many people lose their own lives when hunting it.
I think that money is essential to life and we cannot do without money. But even though money is necessary to life, it can’t buy happiness. Happiness is not something that can be measured by money. It is a state of mind. One can have plenty of money, with which he can buy whatever he wants, and at the same time he is not happy because he is never satisfied or he is troubled by various kinds of problems. Therefore, although money is necessary for a happy life, it can’t buy happiness.
3.
Nowadays in china, many students are the only child in their family. they are the apple of their parents' eyes or even their granparents', so they are free of any house work or menial labor. and moral education is no more than some bookish thing. studentsare largely dependent on their parents and teachers.
To educate them to be independent, the most effective way is to let them experience on their own. therefore,they are better to be given the opportunity to get some train at school-to clean the washing room,which can be regarded as part of the moral education
4.一件难忘的事情(An Unforgetful Thing)
How time flies!I'm fifteen years now.During the long time,there was one thing that I will never forget.
The Spring Festival is our traditional festival.During the Spring Festival,people usually visit their friends and relatives.When I was 9 years old,my family took the bus to my grandparents' to say "Happy New Year" to them.
In the bus,I had a good seat.At 7:30,the bus came to a village.A woman got on with a baby in her arms.At that time,there was no seat.But she must look after her baby carefully.She had to stand next to me.I wanted to stand up and let her sit down,but I was afraid of hearing the other people say"That girl want to be praised."I looked around.Most people were looking out of the windows and some were sleeping.Suddenly,a little boy behind me,stood up and made room for the woman.She said "Thank you very much" with a big smile.The boy smiled,too.When I told my cousin about it after that,he said "The child is the father of a man." I'm very ashamed.Why could't I do the same thing as the little boy did?
From that I learn that we should do our best to help people who need help.If everyone makes a contribution to helping others,the world will become much more beautiful!
5.
工作与娱乐(Work and Play)
Work and play do not contradict each other; in fact, they complement each other. As the saying goes, %26quot;All work and no play makes Jack a dull boy.%26quot; A life burdened with work leads you nowhere, for you would get tired and bored with your daily routine work. On the other hand, proper recreation will relieve the tension and discomfort of our monotonous life because it offers you various ways to let out your pent-up emotions.
What I usually do to relax after school is jogging and seeing movies. Usually I don't spare time for exercise, but I value the physical education class at school. Jogging several rounds in the field certainly relieves the day's pressure. On weekends, I'll catch the morning movie for my visual enjoyment. I feel revived and energetic for another week's work-load.
工作与娱乐并不互相冲突，事实上，它们之间的关系还相辅相成。有句格言说：「整日工作而没有休闲娱乐，会令人变得沉闷乏味。」被工作重担压得喘不过气来的生活，将使你一事无成，因为你将对一成不变的例行公事感到厌烦。由另一方面来说，适度的娱乐活动能提供各种管道，来渲泄你被压抑的情绪，减轻单调生活中的紧张与不悦。
放学之后，我最常做的休闲活动，便是慢跑与看电影。通常我并不特地拨出时间来做运动，但是我很重视学校的体育课。在操场上慢跑几圈，无疑地可以减轻一天的压力。在周末时，我都去看早场电影，享受视觉飨宴。如此一来，我将有如再生般的充沛活力，去面对下一星期的工作量。
6.No Pains,No Gains
It is obvious to everybody that the only way to achieve one’s goal is to work hard. Just as the old saying goes "no mill, no meal". Have you ever seen a man who succeeds just by idling about? Of course, the answer is "No". So we know if you want to gain something, you will have pains.
The farmers harvest by a year of arduous work; the scientists gain achievements by years of devoted researches; students get good marks by working hard; even the little ants have their food by working hard day and night. 1 know there are always some people who wait for the opportunities falling on them. They may attribute their failures to lack of good chances. Therefore, there are so many people gaining nothing at last. Clever men know that the more effort they make, the bigger chance they will have to be successful.
So, when others achieve their aspirations and you still gain nothing, don’t complain about the unfair fate and don’t give up, either. Remember: no pains, no gains.
不劳则无获
大家都知道，获得成功的唯一途径就是辛勤付出。正如那句老话所言：不推磨，没面吃。你见过一令人靠无所事事获得成功吗?答案当然是否定的。因此，我们应明白有劳才有获这个道理。
一年的辛苦劳作使农民获得丰收；科学家经过多年钻研后取得成就；学生努力学习才取得；好成绩；就连小小的，蚂蚁也是靠日以继夜的劳动才获得了食物。但依旧有许多人渴望着天上掉馅饼，他们失败时，会归罪。于运气不好，所以最终他们什么也不会得到。聪明人知道，越努力去做，成功机率越大。
当你看见别人成功而自己仍无所事事时，不用抱怨命运不公，更别轻易放弃。记住，有付出才会有收获。
7.
当今社会,我们应该看重诚信还是看重能力
据报道,某地一女青年用假文凭通过公司面试,进入某公司工作.她工作能力较强,工作干得很出色,但后来假文凭被查出,公司以她缺乏诚信为由解雇了她.
你认为公司这种做法对吗 当今社会,我们应该看重诚信还是看重能力 请根据这一件事件选择其中某一种观点,结合你身边的事例,写一篇100词左右的短文,谈谈你的看法,重点表述你持某种观点的理由,题目自拟.
参考词汇:文凭 diploma 诚信 honesty
Possible versions:
Honesty Comes First
I think it is right to fire her, though she is now good at the job. Her fake diploma does help her, but it also does harm to others. It is unfair for others to compete in the job hunting. So I think honesty should come first. Nowadays, more and more students tend to cheat in exams. I think it is a serious problem. Though you can get higher marks and be praised by others, you should clearly realize that it does do harm to others and even yourself. The fame is temporary and you won't get real knowledge.
In a word, we should be honest and honesty must come first.
Society Calls For Honesty
Personally, I am in favor of the company's decision on firing the woman. Abilities are not always the most important, though one's personality of being honest is what really matters. If the woman was not laid off, no one could guarantee that she wouldn't go against honesty any more.
Society calls for honesty. When accepting someone as a friend, one will always take his honesty, rather than abilities into account. However, some of our own actions are the same case with that young woman. Take cheating in exams for example. Have you ever cheated in exams Most of your answers to this question, I think, are %26quot; yes%26quot;, but the marks are really worth selling your honesty out
A fake diploma will not always help, but the personality of being honest will go with you forever and make things smooth. Now have you attached importance to honesty Have you made up your mind to be an honest man.
8.
Water
Water is very important for living things. Without water there can be no life on earth. All animals and plants need water. Man also needs water.
Water is found atmosteverywhere. Even in the driest part of the world there is some water in the air.
As we all have found out, water may be a solid, or a liquid or a gas.When it isa solid, it may be as hard as brick, When itis a liquid, you can pour it out of a container. When it is a gas, you cannot see or feel it.
Although about 70 percent of the earth’s surface is covered with water,there are many places in the world still running out of water. So we should make good use of water on earth.
水
水对生物很重要，没有水，地球上就没有生命。所有的动植物都需要水。人类也需要水。
水几乎无处不在。即使在世界上最干燥的地方，空气中也有水。
水，正如你所了解的，有固态、液态和气态。当它是固态时，它可以像砖一样硬；当它是液态时，你可以将它从容器中倒出；当它是气态时，你看不见或感觉不到它。
虽然地球表面70％是水覆盖着，世界上仍有许多地方缺水。所以我们要好好利用地球上的水。
9.论因特网(On the Internet)
The Internet seems to have become an indispensable part in modern lire. This is because the Internet has a lor of advantages. To begin with, the Internet provides people with enormous amounts of information in a fraction of a second. With this easy access to the Internet, searching for information has become easier than ever before. Besides, the Internet changes the way people communicate with each other. E mail allows us to write to our friends and receive letters from our friends cheaply and instantly. Furthermore, the Internet has revolutionized business. E-commerce enables people to do business and go shopping at home easily and conveniently. Finally, the Internet plays an important role in mass education.
However, the Internet also has some unfavorable aspects. Cyber crime causes a great loss in people's property. Computer viruses bring us lots of trouble. Trash mail is always a nuisance to everyone. Worst of all, pornography may corrupt people, especially young people.
In a word, the Internet has both merits and demerits. But on the whole, it brings peop[e more benefits than harm. It is suggested that a clever use be made of this modern technique for the benefit of all people.
10.浪费(waste)
Mankind is wasting things every'where and everyday. Wherever we go, we can see that paper, bottles and cans are thrown away; food is wasted just because of poor taste; clothes are discarded simply due to their old fashion. Not only things and money are wasted, but natural resources are abused as well. Trees are cut down merely for fuel; wild animals are killed simply for meat and fur; oil and coal are exploited in a bad way.
The worst example of man's waste is the waste of time. Many people tend to spend their time on worthless things, such as wandering about in the street, gossiping in the office, sleeping too much during the day. As we know, time is very precious to us since it passes by and never returns. The waste of time amounts to the waste of life.
It is time to call for an end to the waste. On one hand, we must save on natural resources and make full use of them; otherwise human beings will be faced with the shortage of natural resources and suffer from the pollution caused by waste. On the other hand, we must trea sure our time. Only with our time devoted to the study and the work for the people, will we never regret the life we have had.
如果你对我找的不满意，给你一个网站：
参考资料：http://www.yumenlong.cn

收起

A并B=A+B-A交B 懂得集合的基本公式这一类的题都可以解决，1楼的是穷举法，不是一般的解题方法，从授人以鱼不如授人以渔的道理出发此题应该这么
A：个位有1的有XX1,X=0-9合计100个，考虑到951~999有5个排除，故合计有95个
B：十位有1的有X1X，X=0-9合计100个，考虑到951~999有0个排除，故合计有100个
C：百位有1的有1XX个，X=...

全部展开

A并B=A+B-A交B 懂得集合的基本公式这一类的题都可以解决，1楼的是穷举法，不是一般的解题方法，从授人以鱼不如授人以渔的道理出发此题应该这么
A：个位有1的有XX1,X=0-9合计100个，考虑到951~999有5个排除，故合计有95个
B：十位有1的有X1X，X=0-9合计100个，考虑到951~999有0个排除，故合计有100个
C：百位有1的有1XX个，X=0-9合计100个，考虑到951~999有0个排除，故合计有100个
A交B：个位十位都是1的，X11,合计10个
A交C：1X1，合计10个
B交C，11X，合计10个
A交B交C，111，合计1个
A并B并C=A+B+C-A交B-A交C-B交C+A交B交C=95+100+100-10-10-10+1=266个

收起