1+(-2)+3+(-4)+...+2011+（-2012）+2013 急,9月15日之前,最好现在就有人回答

解题思路：声音的响度是指声音的强弱或大小；音调是指声音的高低；音色是指声音的品质与特色．声音的响度与声源振动的幅度有关，振动幅度越大，响度越大．

音色是指声音的品质与特色，所以观众能听出是蒋大为的歌声是因为他的声音的音色不同；“男高音”的高侧指声音比较尖锐，即音调高；“高歌”的“高”指声音比较大，即响度大；
故答案为：音色；音调；响度；

点评：
本题考点： 音调、响度与音色的区分．

考点点评： 解决此类问题要会根据响度、音色和音调的定义区分乐音特征的三个因素．

September 15,the fourth-largest U.S.investment bank Lehman Brothers declared bankrupt,marking the U.S.sub-loan crisis eventually evolve into a comprehensive financial crisis.Financial crisis,the rapid development from local to global,conduction from the developed to developing countries,from the financial sector spread to the area of the real economy.In the international financial crisis,the world marked deceleration of economic growth,the United States,the European Union and Japan the three major economies into recession.November 15,held in Washington,leaders of the Group of 20 financial markets and the world economic summit,on the joint response to financial crisis and agreed to support economic growth.Before and after the summit,the United States,European Union,Japan and major economies such as China to launch large-scale financial assistance and to stimulate economic plan to stabilize financial markets and prevent the occurrence of a global economic recession
额,这是原文!

Notice
To help students learn more about computers, we have invited Professor Wang Ping from the Computer Department of Guangzhou University to give us a lecture on Saturday, the fifteenth of September. Professor Huang will talk about the use of computer and how to learn through the internet. The lecture begins at 3:00pm on the fourth floor of the Library Building . Any computer-lover is welcome to attend the lecture. Please bring your questions in computer learning, which will be answered by Professor Huang after the lecture. Don’t forget to be on time.
the Students’ Union
Sep.11th

通知类基础写作。

Yesterday,I met my old classmate Li Mei.We use to play with each other when we are young.I didn't see her for a long time.When I looked at her yesterday,I was shocked to see the changes she got.She grew more beautiful and mature.We talked about what we did in the old days,and we even made a plan to meet again.I'm looking forward to seeing her again.

Septenmber 15th,2013,Saturday Fine
The thing happenged today make me find helping the people who need to halp is very happy .
Today afternoon ,The way on my good friend-WangMei's home ,when i was about to get on a bus ,an old people On crutches came to my view ,Exactly,He also want to take the bus ,geting on the bus only for himself must be a difficult thing.Whihout hesitation ,i help him get on the bus ,The old people appreciate my help so much.i am very happy.the bus come the stop,i say gooybye to the old people.i am worry about the difficulty for him to get off the bus .not for long ,i relax myself .
In short ,As long as everyone gave a love,the world will be more beautiful

30-15+1=16
16÷7=2余2
所以9月30日是星期二

是不是9月8日上午到9月15日上午?
如果是那就用
9月15日-9月8日=7天
提示：（9-9=0）,（15-8=7）,（月-月=0）
最笨的方法用手指掰= =
建议不要用手掰
用第一个方法好（第二个方法用来验算）这是以后物理要用到的格式（不包括提示部分）

thirteenth, August 还有August,13th 其他的一样格式 你的元是什么元 one hundred and eight dollars/yuan/pound 你选一个吧美元/人民币/英镑 seventeen Chinese books thirty-six letters The first middle school...

Her birthday is in the 15th November.

There will be a climbing and picnic on the top of mountain in September 15th, and we should gather at school gate before 6:00am when we take the car.Sneakers as well as water and food are supposed to be carried!（前面都把要点都写出来了你还可以斟酌加一两句类似“请注意”的话,我觉得9月15日就表明周日所以就没翻译周日）

jiu yue shi wu ri xin qi yi

Sept. 15
Sept. 15th
the 15th day in Septembe

Date: September 10th.
The Film Projection on Satuday 7 pm.
Film information：According to the Irish writer Geroge Bernard show works, phymalion film adapted by Ying Xing Audrey Hepburn, a famous star, the play discusses profoundly the British social status, with the unique George Bernard Shaw style humor.
Place：On the third floor in the library
Ticket price: 2 yuan ( ticket to a student card )
可以么?

September 15th Monday

September 15