英语
1-5ABACA
6-10CCABB
11-15CBCAB
16life17live18plan19price20never
21-25DACBB
26-30ADDAC
31-35DACDB
36-40CBABD
二卷:
41-50NFEKCHDLCI
51vegetablesandflowers
52bees
53becauseitwouldcostmorethanshecouldafford
54itwashardforGrandmatocareforthegardenalonewithoutGrandpa
55、ItwashardforGrandmatocareforthegardenalonewithoutGrandpa
作文:
Hi,mynameiszhanghuaisaShanghaiseniormiddlestudents,EnglishspokenEnglishisverygood.ForIamfamiliarwiththecultureofShanghai.Myfamilylivesinbinjiangroad,128,exhibitionverynear,expomyfatherisapoliceman,dailyworkverybusy,maintainthesafetyproblemsinShanghai,mymotherisanurse,bringalotofconvenience.Ourhouseisverywarm.Veryhappy.
Mr.Smith,Ihopeyoucanliveinmyhouse,andIwillbringyoumuchhappiness.Bringyoulotsofconvenience.
FinallyIwishyouhappy.
数学
1-5CCDBB6-10CAACC11-15CDBDB(16)COS派除以2010(17)负一
(18)16(19)四分之一(20)三分之一
21.∵a平行于b∴2*1/6-sinα*cosα=0∴(sin2α)/2=1/3∴sin2α=2/3
22.因为a2=2,a4=8所以a1乘q=2,a1乘q得三次方=8,所以q方=4所以q=2,a1=1,所以sn=2得n次方-1
23题:因为正方形ABCD又因为ABCD-A1B1C1D1是长方体所以AC垂直BDD1D垂直面ABCDB1B垂直面ABCD所以B1B垂直ACD1D垂直AC因为AC垂直BD所以AC平面B1BD1D
24:一共有6种,以下为(1,2)(1,3)(1,4)(2,3)(2,4)(3,4)均为奇数的概率为1/6同为奇数或同为偶数的概率为1/3
25(1)要有不相等两实数根则△=b方减4ac有因为a+b+c=0所以b=负a-c所以b方减4ac=(负a-c)方-4ac=a方加2ac加c方减4ac=a方减2ac加c方=(a-c)方又因为a>c所以△大于0所有有两个不相等的实数根