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谁能帮帮做做以下的作业呀!3(高数题) 已知4a=7b,求b/a-b,和(a+b)/(a-b) 如图第十题 根据4a=7b可得a:b=():(),若a比b多60,则a与b的和是()看看做做吧 求一道反比例函数题两个反比例函数y=3/x,y=6/x在第一象限内,点P1,P2,P3,…,P2005,在反比例函数y=6/x的图像上,他们的横坐标分别是x1,x2,x3,…,x2005,纵坐标分别是1,3,5…,共2005个连续奇数,过点P1,P2,P3,… 如果4A=7B,则A与B成什么比例? 3/4A=4/7B,A和B成什么比例 若4a=7b(a,b均不为0),则a:b=(). 什么是理性主义?在设计管理中有什么作用? 高数三题第一题:第二题:第三题: DO.lions.come.from.south.africa?这句话怎么回答?人都到哪里去了呀? 高数第三题? lions come from Africa(改为否定句) lions come from Africa(改为否定句) 类似的句子 5a+(2-4a)=0 in the number of 的用法是什么 3.6x-5.2=7 我需要一篇命题作文,其实快乐很简单. 这两个解方程怎么写.要计算过程. 科技书集读后感 We took a ferry to PuDong this morning该另一种句式 The old man upset because his favourite vaThe old man upset because his favourite vase ________by his grandson.A.broke B.had broken C.is broken D.was broken 选什么, 请神的咒语 harry is very upset because he doesn"t know( )A:whom are his real friendsB:who his real friends areC:are who his real friendsD:are whom his real friends The boy looked upset because he got a "C" yesterdayA.sadB.tiredC.worriedD.happysad or worried 若3^x=5,3^y=4,求3^2y-3x 用灰心丧气,屡次小心翼翼,纳罕,迅捷,瘦骨嶙峋,迂回,高不可攀,头晕目眩,啜泣造句 But ,most of the time,a man loves a womam because of her beauty!什么意思 汽车以72km/h匀速行驶,发动机实际功率20kW.若汽车行驶100km,汽油热值q=4.6*10的7次方J/kg,发电机功率为25%.求 汽车在这段路程中:①运动时间②发动机所做的功③消耗汽油的质量(保留一位小数)(所 这个是我用扫描的 要点图片拉 家有儿女观后感200字左右 都写感想 不提内容 家有儿女 观后感要500字的文章,