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两车同时从相距180千米的两地相向而行.经过五分之九小时相遇.甲车每小时行驶45千米,乙车每小时行驶多少千米 两车同时从相距180千米的两地相像而行..经过5/9小时相遇.甲车每时行驶45千米,乙车没小时行驶多少千米 1道语法选择提13.The young actor _____ acting in a new film for nearly half a year.His parents are worried about his health and study.A.being abroad B.having been abroad C.was abroad D.to be abroad 语法选择, 王昭君嫁了几次 甲乙两车同时从AB两地相对开出,甲车每小时行45千米,乙车每小时行60千米.两车正好在距中点45千米处相遇,求A两车正好在距中点45千米处相遇,求AB两地相距多少千米? 我快没耐心了!My patience is beginning to _______ _______.求翻译! 如何做好语法选择 (4x -3x+6) · ½x 3x+290=4x=189 x=? Fishing is a hobby which calls for a great deal of patience,______I don't have这个空如果去掉逗号,填what可以吗 还是填that或which 求教,正项级数∑(n→∞)(1+n)/(1+n^2)为何是发散的? 第二个等号到第三个等号是为什么 选哪儿个?是什么语法点?12.All the newspaper reporters hurried to the airport,_______ that the pop star didn’t turn up at all.A.disappointing to find B.disappointed finding C.disappointing finding D.disappointed to find 求数项级数∑(n=1)(n-1)/(n!*2^n) 英语翻译run out has run 求无穷级数∑1/n!的和 the meter has run VC++ 里双等号==与单等号= 的区别和各自的意义是什么? 求(x-2xy-y^2)y'+y^2=0的通解 2.They all looked ( ) at the waiter and felt ( ).a.sad,sadb.sadly,sadlyc.sad,sadlyd.sadly,sad ..要仔细看Body lauguage is just as spoken words?Why?Because it has the ability to make your true intention___1___to other people.Below are some examples.The first one is eye contact.You could know ___2___a person is thinking or feelingthrough the 踏板摩托车排气管噪音大一加大油门就非常响 甲乙两堆煤共60吨,甲堆煤的3/5正好等于乙堆煤的4/7,甲乙两堆各多少吨? 甲.乙两堆煤,如果乙堆增加20吨,就与甲堆同样多:如果甲堆增加260吨,就等于乙堆的3倍.甲.乙两堆煤各重多少吨? 初中语法选择题 帮忙!( ⊙ o ⊙ )啊!1.Mary received _ many postcards at Christmas.A.so B.such C.too D.even2.The little girl is becoming _.A.more and more healthy B.more healthier C.more and more healthierD.healthier and healthier3.Light tra 心脏跳动频率低的动物寿命是不是比较长? no weaker than The Nations is no stronger than the collective will of the Nations that support it.这句话的意思是没有成员国集体意志的支持,联合国是发挥不了任何作用的.里面的no stronger than 不是我们平常的理解 你认为你是谁 作文怎么写? 指数函数求解（1）请问下面的推导错在哪x^x^x＝e^[ln(x^x^x)]＝e^[x*ln(x^x)]＝e^(x*x*lnx)＝e^[(x^2)*lnx]＝e^{ln[x^(x^2)]}＝x^(x^2)＝x^x^2≠x^x^x(x≠2时)（2）f(x)＝x^x^xf'(x)＝?为什么 你是谁作文 求解指数函数1.7^x=4^(x+3)2.1249=175e^(-0.04t)