今年国庆节,王明坐火车到南京去,刚上长江大桥时,他看了一下手表为17:20,过桥后他又看了一下手表为17:25,如果知道

设原需要N月,工程量为1：
提高效率后每月完成量为：（1+15%）/N,完成需要时间就为N/(1+15%)
提前三个月即：N-N/(1+15%)=3,根据这个公式就可以算出原来需要几个月了.

135x6x0.9=729元
135÷（8+1）x8x6=720元
B超市比较便宜,便宜9元.

B

Dear Colleagues,
It is hereby noticed that this year's National Day and Mid-Autumn Festival holiday arrangement is from Oct. 1st to 8th , total 8 days. The holidays include the official holidays of the National Day, Mid-Autumn Festival and public holidays. Pls be attention that after adjustment Sep. 27th and Oct.10th are working days.
(We hope you a happy and safety holiday!)

不建议去南方，因为多雨多台风，不建议去北京旅游，因为太炎热，不不建议去登山，因为太累而且有一定危险。最佳的方案，是到沿海城市消暑，尤以北方城市为佳。如辽宁省的大连、旅顺，河北的秦皇岛、北戴河，山东省的烟台、威海、青岛、日照等地。如果时间允许的话，可以设计将辽东半岛与山东半岛旅游连接起来，也就是先到大连、旅顺，再坐船到烟台，游玩威海、青岛，最后从青岛返程。也可以先到青岛，经烟台威海再到大连，从大连返程。

设原计划完成这项工程需要X个月
则原计划的效率为1/X

1/X*(1+15%)+3=1/（X-3）
整理
（X-3)*(1+15%)=X
1.15X-3.45=X
0.15X=3.45
X=23（个月）

老师说了
翻译
就是把意思表达清楚就好
所以
不在乎怎么说法
那么
可用中文这么说
国庆长假加放一天 那一天是中秋节的假日
今年
这样 把复杂的句子弄简单就行了
懂没 亲爱的学生

设A超市去年销售额为x万元,则B超市去年销售额为(150-x)万元
115％x+110％（150-x）=170
1.15x+165-1.1x=170
0.05x=5
x=100 A超市销售额=100乘以1.15=115（万元） B超市销售额=170-115=55（万元）
答：A超市营业额115万元,B超市销售额55万元

设去年A超市销售额X万元
（1+15%）X+（1+10%）（150-X）=170
接下来你应该会做了

7月、8月、9月共有：
31+31+30=92（天），
92÷7=13（周）…1（天），
余数是1，那么国庆节是星期五．
故答案为：错误．

记得这道题好麻烦,老师说了好多,你可以把这题空着,去向老师请教.这道题非常好,一定要记下来!

My Motherland
To celebrate the 60th anniversary of People's Republic of China.
In this unusual year, the number of tragic, how many have touched, how many dreams, how much glory there is, bearing in mind the hearts of the people in China, written into the history of the Republic.
The success of the Beijing Olympic Games, the Chinese people realize the dream of a century. Chinese athletes to outstanding athletic ability and indomitable fighting spirit of the first gold medal total to create the best score in history.
Win back the Shenzhou VII, the three astronauts returned to space out all smiles. Shenzhou VII manned space mission a complete success, the implementation of China's space technology development milestone major leap forward, the people of China are climbing the peak of world science and technology of another great feat, but also dedicated to the great homeland of the precious 60-year-old birthday present
General of the Chinese nation just like the Great Wall of steel indestructible! The return of Hong Kong in 1997, the return of Macao in 1999; in 1998 the south face of the history of a rare flood in 2003, the face of panic-stricken people of the SARS epidemic in 2008, some ten provinces in the face of the rare snow disaster, earthquake SichanWenchuan , the Chinese people united, will be suffering at the foot of resistance!
We firmly believe that the great rejuvenation of the Chinese nation on the journey is bound to occur one after another glorious 30 years! The rise of the Chinese nation will surely make the world as we can be proud of!

___________________________________________________________________________________
One possible version:
October 4 Sunday Sunny
This morning, I was walking along the main street to the city park when I found heavy smokes poured out of a building opposite the main road. Obviously it was on fire. I called the firefighters.
Several minutes later, the firefighters arrived and tried their best to control the fire. With their help, many people managed to get out of the building safe and sound. All of a sudden a foreign woman came in a hurry almost out of breath and shouted. But she couldn’t make herself understood. I went to the woman and asked her what was happening. She told me that her daughter was still trapped in the fire. I told the firefighters about it at once. They immediately ran into the building. Shortly afterwards, they rushed out with the little girl.
The woman was very grateful to me and the firefighters for the help.

略

解题思路：先求2014年10月1日到2015年10月1日经过了多少天，再求这些天里有几周，还余几天，再根据余数判断．

2014和2015年是平年，
所以2014年10月1日到2015年10月1日一共有364天，
364÷7=52（周）
所以2015年的国庆节是星期三．
答：2015年的国庆节是星期三．

点评：
本题考点： 日期和时间的推算

考点点评： 解决这类问题先求出经过的天数，再求经过的天数里有几周还余几天，再根据余数推算．