以文科生为话题的作文

what does clenda smith do?的汉语意思? what is 中文意思是甚么?what does 中文意思是甚么?1)what is 中文意思是甚么?2)what does 中文意思是甚么? What does your father do?的中文意思是什么啊? what can Cindy does?单句改错 有什么好听的成语 什么动听成语 never_________his homework ,but he does well in all subjects.A did tom do B tom does C does tom doD tom has done Students like Tom_____（do）well in Chinese.填does还是do? 若3x²-x-1+0,求6x三次幂+7x²-5x+2001的值要有过程,急,谢谢 Tina is a little w--- in science,but she is good at Chinese and English. Tina is good at speaking Chinese.（改为同义句） What does Mr.Green do? is she good at chinese?同义句是什么 She isn't good at Chinese.的同义句：She ＿ ＿ ＿ in Chinese. Is she good at chinese?改成同意句 Does she [ ]chinese?括号里填什么? 4题 任意一个数列a（n加1）减a（n减1）能算吗 在△ABC中,若(sinA+sinC)(sinA-sinC)=sinB(sinA-sinB),则C= 已知x^2+y^2=1,对于任何x,y属于任何实数.恒有x+y-k>=0成立,则k的最大值为多少? 数列：已知数列[An]前n项和为Sn a1=1 An+1=2Sn 求【An] 求【n-An]前n项和Sn数列：已知数列[an]前n项和为Sn,a1=1 ,a[n+1]=2Sn,求[an]通项，求[n-an]前n项和Sn.注：a[n+1]指a 的下标为n+1而不是以n为下标的a加上1. an=1+2+3+..+n数列an分之1的前n项和为 托福报名怎么选日期和考位?我已经在NEEA付过费了,可是只有考位查询,没有预定考位,怎么回事呀?查询考位里面5月份还有位子啊,就是没有预定之类的选项 谁会托福改分 托福改分是真的吗?谁能帮忙回答一下 设x>y>z,n∈正整数,而且1\(x-y)+1\(y-z)≥n\(x-z)恒成立．则N的最大值为（ ） 设x>y>z,且1/(x-y)+1/(y-z)>=n/(x-z)(n属于N*)恒成立,则n的最大值为_要解法 x>y>z,n属于N(x-z)/(x-y)+(x-z)/(y-z)>=n恒成立,求n的最大值 设x>y>z>0,若1/x-y+1/y-z+n/z-x>=0恒成立,则n的最大值是? 若A=4x平方-2x-1,B=3x平方-2x-4试比较A与B的大小关系 12月12日的托福成绩何时能出来 6x＝8(x－5)怎么解? 已知函数fx=lnx-a（x-1） 1、fx的单调性.