在3分钟内答对者有赏 (5-100悬赏)

汶川的小朋友,你们好,我是金华的小朋友,前几年,汶川发生了大地震.地震太可怕了,我从电视上看到一座座房子变成废墟,很多人被压在废墟里没有了生命.在这个最困难的时候,请你们一定要坚强.大家都在为你们捐钱捐物,让你们尽早回到学校,请不用担心.六一儿童节又到了,祝你们快乐乐,努力地去实现自己的梦想.汶川,加油!名师点评：你肯定有很多话要对汶川的小朋友说,并且周围的人都做了很多的行动.汶川的小朋友并不知道,你可以将周围人的行动告诉她们,让她们看到希望,看到光明.你也可以将自己的愿望告诉她们,让她们知道有很多很同们同龄的小朋友在支持她们.

解题思路：本题中的等量关系：20秒×次数+40×次数=3×60．根据这个等量关系列出方程求解．

设20秒的广告播x次，40秒的广告播y次．
则：20x+40y=180，
∵每种广告播放不少于2次，
∴x=3，y=3，或x=5，y=2．
当x=3，y=3时，收益为：3×6000+3×10000=48000；
当x=5，y=2时，收益为：5×6000+2×10000=50000
∴这一天黄金时段3分钟内插播广告的最大收益是50000元．
故填50000．

点评：
本题考点： 二元一次方程组的应用．

考点点评： 解题关键是弄清题意，找到合适的等量关系：20秒×次数+40×次数=3×60．合理分析得出结论．

解题思路：根据空气中各成分的体积分数进行分析解答即可．

空气的成分中，氧气的体积分数约占21%，成年人每分钟大约需要吸入8L的氧气，则3分钟内大约需要吸入空气的体积是[8L×3/21%]=114.3L
故答为：21%；3分钟内大约需要吸入空气的体积是114.3L．

点评：
本题考点： 空气的成分及各成分的体积分数．

考点点评： 本题很简单，熟记空气的成分及各成分的体积分数并能灵活运用是即可正确解答本题．

72÷3X60=1小时转的圈数,720圈走1度电

3000r/KW.h 意思是转盘转动3000转,用电器消耗电能一千瓦小时（1Kw.h）,也就是一度电.
1Kw.h=1000w*1小时=1000*3600秒=3600000=3.6*10^6J
1Kw.h/3000=1200J 也就是说转盘每转一圈,用电器做功1200J
用电器的功率 P=15*1200/(3*60)=100w
有疑问可追问,祝你学习进步.

当0≤x≤3时,y＝5x
当3≤x≤12时,y＝﹣5/3 x＋20
① 5x＞5,x＞1
② ﹣5/3 x＋20＞5,x＜9
∴ 1＜x＜9.

嗯，可以的。如需要写这个，加下俺。上大学的时候，英语演讲稿，这些经常写的。

设：通话时间为T,若T为整数,则实际计算时间T=T1,若T不为整数,则T=T1-非整数部分.
依题意可得：W=T1-3+2.4
=T1-0.6
可按实际情况算出T.

入口到出口的距离未变为s,原乘客相对地面运行速度为v,现相对梯级运行速度为为v,即相对地面运行速度为2v;
s/v=3分钟
s/2v=1.5分钟

金黄 姜黄 桔黄 金色 深黄 淡黄 浅黄 明黄 土黄 嫩黄 鹅黄 焦黄 娇黄 奶黄

It was one day morning in May.Xiao Han paid a visit to his friends.On his way he found a crowd of onlookers had gathered,then he just went and investigate.He saw a woman lying on the street,for being hurt in the traffic
accident.He called the driver to stop right away and sent her to the hospital.Then he paid the treatment expenses by himself and tried to contact her family.After all,her husband got to the hospital and has learnt that what had happened to his wife.When he was willing to express his thanks to him,Xiao Han had already gone.

秋天的风,残酷而暴戾,给老树脱去残破的旧衣
冬天的雪,清凉而寒冷,为大地盖上银色的棉被

A Sunday school teacher was telling her pupils the importance of making others glad."Now,children," said she ,"has anyone of you ever make someone else glad?"
"Please,teacher ,"said a small boy,"I've make someone glad yesterday."
"Well done.Who was that?"
"My grandma"
"Good boy.Now tell us how you made your grandmother glad."
"Please,teacher,I went to see her yesterday,and stayed with her three hours.Then I said to her,'Granny,I'm going home,' and she said,'Well,I'm glad'!"
一个主日学校校(基督教教会为了向儿童灌输宗教思想,在星期天开办的儿童班)的老师在对学生讲使别人高兴的重要性.“现在,孩子们,”她说：“你们当中有谁让别人高兴过?”
“我,老师,”一个小男孩说：“昨天我就使别人高兴过.”
“做得好,是谁呢?”
“我奶奶.”
“好孩子.现在告诉我们,你是怎样使你奶奶高兴的.”
“是这样的,老师.我昨天去看她,在她那儿呆了三个小时.然后我跟她说：‘奶奶,我要回家了.’她说：‘啊,我很高兴!

　　The Rabbit And The Turtle
　　One day,a turtle is climbing.A rabbit sees the turtle.It asks the turtle:“Hi,turtle.What are you doing?” “I’m running.” The turtle says.“Haha,you are running?How slowly!Let’s have a race.Let’s see who runs fast.” The rabbit laughs at the turtle.“OK.i believe i will beat you” The turtle says.
　　The next day is a sunny day.The turtle and the rabbit are ready for a game.Many animals are watching.“Three !Two!One!Start!” monkey says.The rabbit and the turtle runs to the end.The rabbit runs very fast.The turtle is climbing with aslow but steady pace to the goal.It’s behind the rabbit.The rabbit runs to a tree.It sees the turtle is behind.It thinks:“The turtle is very slow.I can sleep under the tree.” So the rabbit was found a comfortable place,lie down and fell fast alseep.
　　The turtle climbs to the tree.It sees the rabbit is dleeping and doesn’t stop.In the end it gets to the end and is very happy!Now the rabbit wakes up.It thinks the turtle is still behind.The rabbit runs to the end.when ihe rabbit reached the end.It sees the turtle there.“Haha,I win!” the turtle says.The rabbit is very sad.It is crying.
　　This story tells us:we can’t be pride.

3分钟=0.05h
电灯此段时间消耗电能为
5/2500=0.002kWh
P=W/t=0.002kwh/0.05h=0.04kW=40W

成语：龙腾虎跃

哪里有这么贵的 你是数学题目吗?

y分之x

y=(t-3)×0.8+2.4
{如果(t-3)是小数,取整数部分+1}

America is well-known for its equality, liberty, fraternity. Everyone is very friendly and informal. Children often call their parents by their first names and at work. Subordinates do not normally use "Mister" when addressing their supervisors. To those visitors who come from a more rigid and stratified society, such casualness can be confusing, leading to egregious（严重的）blunders. Conversely, many worldly, sophisticated Americans appear mortified because they feel America is not "civilized," with a capital "C." However, we know of terribly embarrassing incidents from mistakes which only an innocent foreigner would have made.
Public displays of affection between the sexes are very common, unlike perhaps where you have come from. In many cities, especially San Francisco, homosexuality is an accepted way of life. You may therefore see men being affectionate with men and women with women. If you disapprove of homosexuals because of your religious or cultural beliefs, please keep it to yourself. You might even find yourself a guest in a gay person's home-and might become shocked to realize that your host is a normal human being like any other and that you are actually enjoying his hospitality. Many couples also live together without being married-and may never marry. But you must realize their bond is probably as strong as the bond of marriage. So don't think one of them is available for a "date."
America is a notoriously "open" society, and to most foreigners Americans often appear exceptionally and "instantly" friendly. But sometimes such openness can lead to serious misunderstanding, especially between men and women. A casual invitation to have drinks and/or dinner does not mean that your American host also wants to become "intimate" with you afterwards. So be careful not to read too much into a friendly invitation.

5HZ
蝴蝶翅膀的震动属于次声波;蚊子的翅膀震动频率是在人的听觉范围(20~20000HZ)内.

那天,邻居李阿姨和妈妈闲聊,李阿姨抱怨说：“我家的小强,真是不争气,眼看着快要期末考试了,每天回来的第一件事情,就是玩电脑,为这事我没少跟他唠叨,你说,他怎么就长不大呢?”小强比我小3岁,小学5年级.按说,他这个年...

（1-19/27）的立方根2/3

你应该先用标准品建立一条标准曲线的.纵坐标是吸光值,横坐标是酶的活力.然后计算出标准曲线的回归方程,再测样品的吸光值,在曲线上查找酶活力.
不管怎么说,都需要先建立一个标准.或者有一个对照.
已知浓度的酯酶,梯度稀释成不同的浓度,分别测OD值.然然后绘制标准曲线.R2控制在0.990-0.999之间.得出标准曲线.

勇敢的站起来也许就是成功！

85*（-1/5+1/17-1）
=85*（-1/5）+85*1/17-85
=-17+5-85
=-17-80
=-97
五分之一是1/5,你写错了.

1、如果全功率输出的话P=W/t W=PT＝12000*180＝2160000J
2、FS=2160000 F=2160000/200=10800N.

A ---Hi ,B,have you had any plan about our coming summer holiday? B ---Yes,may be i will have a trip with my parents. C ---Oh,thats great!where will you go. B ---Hainan.what about you two? A ---I will take part in an English learning cause...so boring C ---B,You are so lucky.See,what i can do is only staying at home. B ---hehe,I will bring presents for you. A ---Anyway have a good time. C ---well ,you are a lucky guy,but remember to protect your skin from the sunshine there. B ---May be when i go back ,i have become a black man A ---That's not bad.just a sunbath Then,A,B,C,laught togethe

欢声笑语贺新春 欢聚一堂迎新年 横批：合家欢乐

公式：P=R / r
其中p为功率,
R为电表实际转数每小时
r为电表转率,固定值,在表盘上写的有,题中未提供.
根据题可算出：P=15/3*60 / 3200(由于未提供,暂设为3200)
=300/3200
=0.09375 kw
即冰箱的功率为94瓦,可查冰箱铭牌核对.但由于冰箱是间歇工作的,电表是记录电量的,即一段时间内累积用电情况的,所以取决于冰箱的工作情况.

0.55

从A地向B地打长途电话,按时收费,3分钟内收费2.4元,以后每超过1分加收1元,若通话t分（t＞3）,
话费y(元)与t(分)之间的函数关系式是__y=t-0.6___________________.
y=2.4+1×（t-3）=t-0.6

应该是 Small Grave 才对 形容词修饰名词,放在名词前面
Small Grave 的意思是 “小小的墓穴”
请采纳,有问题的话追问我,祝好!
【来自英语牛人团】

为自己浪费了时间感到羞愧.
为时间飞快地流逝感到惋惜.

匀速耕地,所以牵引力F=阻力f.
v=200/（3*60）=（10/9）m/s.
功率P=Fv,所以F=P/v=12*1000/（10/9）=10800牛.
f=10800牛

3min=180s 这时间内汽车会离开摩托出发点多远：20*180+1000=4600m
所以说摩托要在3分钟内走4600m才可以追上汽车.
设摩托的加速度为a,加速时间为t,然后根据s=vot+0.5at^2和vt=vo+at可以得到两个方程：
0.5at^2+30(180-t)=4600

0.1(X-3)+O.2+6y0.07=1.84
Y>=2
当Y=2时有最大值,因为长途贵,要时间长及时市内通话时间最长.
x=11
11+2=13
最多13分钟

5千克比（12.5）千克少60%.

所以,如果你下次在你办公室发现乒乓球,就感谢这台神奇的电脑吧.

3 分钟内看到马路的一边有白杨树 151 棵,则共有 151-1 = 150 个间隔,
已知,每隔 7 米有一棵白杨树,
可得：无轨电车 3 分钟行了 7×150 = 1050 米 = 1.05 千米；
所以,无轨电车每小时行 1.05÷3×60 = 21 千米.

不同1 grape 【ei] 2 cat [ 】 我的动力 希望我能继续帮助你

我想要个像你的名字一样的中文名字.
最后的you 是不是错了,应该是yours.

八岁/观画师何澄/画《陶母剪发图》

一、1000÷（1+3）=250（人）
二、24÷2/3=36（人）
36÷9/1040（人）

少先队员在共青团xx县第十三次代表大会上的献辞
亲爱的大哥哥、大姐姐,你们好!
沐浴着三月的阳光
洋溢着青春的力量
高举着邓小平理论伟大旗帜
传递着“五四”不灭的火炬
走来了,全县青年的优秀代表
今天,共青团xx县第十三次代表大会隆重开幕了
带着全县少先队员的美好祝愿
我们来到了共青团的会场
在这无比庄重的时刻
让我们高举右手
敬礼!献上我们少先队崇高的队礼!
中国共产主义青年团
多么骄傲,多么自豪
她布满着蓬勃朝气
她凝聚着青春力量
她象征着美好前程
她寄托着无限希望
鲜红的党旗指引着前进方向
金色的团徽闪耀着时代光线
她是共产党的后备军
她是少先队的好榜样
青春的足迹
在改革开放的征途上闪光
青春的事业
在与时俱进的开拓中兴旺
请翻阅我们的创业史
请检验我们的军功章
共青团 甘洒热血写春秋
众志成城铸辉煌
看吧,团县委高度重视人才培养
岗位建功,创新创效
十杰百佳,树立榜样
奋力攻坚,敢拼敢上
科教兴县培育英才
立志建设新梦泽
看吧,青年文明示范行动全面开展
“三个文明“重要思想大放光线
志愿服务,遍布全县
爱心助学,慷慨解囊
扶困助残,共享新世纪阳光
标兵示范,青年文明号旗帜处处飘扬
看吧,青年创业实践成果显著
产业调整,科技攻关
广大青年人人敬业爱岗
项目领办,开展竞赛
青年科技示范基地树立榜样
科技兴县,实干兴团
共青团品牌工程塑造美好形象
一代伟大曾经说过
你们是早晨八九点钟的太阳
希望寄托在你们身上
你们是无愧于时代的骄子
你们是小康建设的栋梁
与时俱进,你们勇立潮头,扬帆远航
开拓创新,你们劈荆斩棘,乘风破浪
党的十六大吹响了进军的号角
十届人大又翻开了崭新的篇章
历史的车轮靠我们去推动
时代的伟业靠我们来开创
拍一拍我们的铁肩吧
党把我们熔铸成非凡的钢
拍一拍我们的胸膛吧
人人胸怀“三个代表”重要思想
为党旗增辉
为团徽增光
为祖国日益繁荣富强
为我县建成楚天强县
奋斗吧
长江后浪推前浪
自豪吧
一代更比一代强
借今天的机会我们郑重宣誓
今天,我们是光荣的少先队员
明天,我们将接过你们手中的接力棒
自尊、自爱、自立、自强,
在改革开放的风浪中锻炼雏鹰的翅膀
时刻预备着
建设楚天强县
时刻预备着
全面实现小康
时刻预备着
实现共产主义远大理想
en.
楼主凑合着用吧...

一块二

There's a beautiful vase on my desk, beside it , that's my favorite sationery box.

Born to Win 生而为赢
Born to Win
Each human being is born as something new, something that never existed before. Each is born with the capacity to win at life. Each person has a unique way of seeing, hearing, touching, tasting and thinking. Each has his or her own unique potentials---capabilities and limitations. Each can be a significant, thinking, aware, and creative being---a productive person, a winner.
The word “winner” and “loser” have many meanings. When we refer to a person as a winner, we do not mean one who makes someone else lose. To us, a winner is one who responds authentically by being credible, trustworthy, responsive, and genuine, both as an individual and as a member of a society.
Winners do not dedicated their lives to a concept of what they imagine they should be; rather, they are themselves and as such do not use their energy putting on a performance, maintaining pretence and manipulating others. They are aware that there is a difference between being loving and acting loving, between being stupid and acting stupid, between being knowledgeable and acting knowledgeable. Winners do not need to hide behind a mask.
Winners are not afraid to do their own thinking and to use their own knowledge. They can separate facts from opinions and don’t pretend to have all the answers. They listen to others, evaluate what they say, but come to their own conclusions. Although winners can admire and respect other people, they are not totally defined, demolished, bound, or awed by them.
Winners do not play “helpless”, nor do they play the blaming game. Instead, they assume responsibility for their own lives. They don’t give others a false authority over them. Winners are their own bosses and know it.
A winner’s timing is right. Winners respond appropriately to the situation. Their responses are related to the message sent and preserve the significance, worth, well-being, and dignity of the people involved. Winners know that for everything there is a season and for every activity a time.
Although winners can freely enjoy themselves, they can also postpone enjoyment, can discipline themselves in the present to enhance their enjoyment in the future. Winners are not afraid to go after what he wants, but they do so in proper ways. Winners do not get their security by controlling others. They do not set themselves up to lose.
A winner cares about the world and its peoples. A winner is not isolated from the general problems of society, but is concerned, compassionate, and committed to improving the quality of life. Even in the face of national and international adversity, a winner’s self-image is not one of a powerless individual. A winner works to make the world a better place.

如果一片树叶代表一份快乐,我想送给他们一片森林