10月11号换题库，记录一下我记得的题目

tess2086347

1. 数学：
1) 定义：a(K)=7K, 10^n可以除以 a(1)a(2) a(3)a(4) a(5) a(6)……a(28)，求n，选项有A. 8，B.7，C···  (后面选项不记得了)
我选了7，不知道，对不对，数字应该正确

2)
还有一道题目DS是这样的，求n, 给出的条件是：
(1)        11^n的十位数是4
(2)        5^n的百位数是6
因为(1)和(2)中的4和6随着n的变大，都是可以重复出现的，所以我不确定是否会有多个n满足这样的情况，至少当n=4的时候，(1)+(2)是可以满足的，但是最后还是选了E

3) 有三个圆，1个小圆C(圆心定义为C，半径为r)，2个大圆B&圆A（圆心定义为B, A,半径都为R），其中圆B&圆A分别与圆C相切，切点分别为D&E，其中角BAC是直角，求什么来着，给忘了，唉~~~残狗一只。

4）有一个圆（半径是r），中间被挖掉了一个一个120°的部分，就是剩下的是一个2/3个圆形，问这个2/3的圆折叠成圆锥（中间没有重合），那么圆锥的高是多少。（用2/3这个圆的周长=圆锥的周长就可以求出来）

AWA:
Our total sales have increased this year by 20 percent since we added a pharmacy section to our grocery store. Clearly, the customer’s main concern is the convenience afforded by one-stop shopping. The surest way to increase our profits over the next couple of years, therefore, is to add a clothing department along with an automotive supplies and repair shop. We should also plan to continue adding new departments and services, such as a restaurant and a garden shop, in subsequent years. Being the only store in the area that offers such a range of services will give us a competitive advantage over other local stores.

fan850925

无用帖，麻烦版主删一下

lily930430

第二题那个5^n的百位数是6 当n=4的时候是600 n>=5的百位数不就都是0了么。。。还是我想错了。。求指教啊

tess2086347

fan850925 发表于 2013-10-11 16:19
楼主 求点阅读 关键词 我是阅读酱油君 饭饭

我阅读真的很差，脑中空空，记得碰到一道讲“super earth”，各种mantle, atmosphere之类的，不记得了

meishiba

请楼主帮忙看看是不是这篇作文题目

Our total sales have increased this year by 20 percent since we added a pharmacy section to our grocery store. Clearly, the customer’s main concern is the convenience afforded by one-stop shopping. The surest way to increase our profits over the next couple of years, therefore, is to add a clothing department along with an automotive supplies and repair shop. We should also plan to continue adding new departments and services, such as a restaurant and a garden shop, in subsequent years. Being the only store in the area that offers such a range of services will give us a competitive advantage over other local stores.

tess2086347

lily930430 发表于 2013-10-11 16:24
第二题那个5^n的百位数是6 当n=4的时候是600 n>=5的百位数不就都是0了么。。。还是我想错了。。求指教啊 ...

n=5的时候是625，百位数是6

tess2086347

meishiba 发表于 2013-10-11 16:30
请楼主帮忙看看是不是这篇作文题目

Our total sales have increased this year by 20 percent since we ad ...

对的，就是这个，这个是哪儿摘的啊？

meishiba

一站式服务那篇作文，题库44

lily930430

tess2086347 发表于 2013-10-11 16:31
n=5的时候是625，百位数是6

啊。。对对对。。我怎么想到600去了。。感谢！

Amyuzi

顶!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!