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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.
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