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勇气 作文开头、结尾怎么写 They need help because they have r____ out of mThey need help because they r_____ out of money and food. It's very polite( )you to help others when they need help.A.of B.for C.with D.on书上答案是A,但有一个句式是It's+a.+for sb.+to do sth.,为什么不是B呢? This evening you need to take _____ (more than usual )care on the roads because it is very icy. they like the sweater because it,s very nice对 because it,s very nine提问 求极限lim(x趋向于0) (x-tanx)/xsinx^2 limx趋向正无穷xsinx分之一的极限 英语翻译请帮翻译这句的意思? 英语翻译说说为什么 We need help for our Beidaihe School Trip.） we need help for our beidaihe school trip. 请问,for和哪个词,搭配,是help还是need,是固定词组吗又如何翻译 we need help for our Beidaihe School Trip中for 关于观察动物为主的大自然的启示400字的作文急 写水的诗句 那些写水的诗句? 如何求这个式子的极限?[根号下（1+xsinx)-根号下(cosx)]/(xtanx) x趋于0,求极限,详细些,谢谢. 求limx→0(根号2-根号(1+cosx))/(sin3x)^2的极限求详解 limx趋于0 [x/根号下(1-cosx)]分母为什么不能用等价无穷小代换 为什么说这不是等价的答案怎么就变成极限不存在了 爱的教育读后感150字的 英语翻译1.the three- -and almost all other south florida high school students have to go outside of the classroom to earn their diplomas ,doing what schools call"community service" 英语翻译那么该如何回答啊？ 求a(n+1）=（3n+2)an +1 的通向ana1随便一个值 请高手翻译下if i need any visa help culd u help me for visa process 就是给前3项 然后从第四项开始每项都和这一项的前3项发生关系 给题目也一定要给出答案 题目越多越好邮箱646824669@qq.com 不仅仅是加法 其他的运算法则也要 比如减法 除法 先减后除 甚至是 I need help and care.some warm?翻译准确的得分 I need help 关于高数（一）中极限的问题：当x趋于0时,(xsin1/x+1/xsinx)极限是多少?这个问题看似不难,可书里的答案是0,我认为是2,请指教指教,在下感激之至! 求极限（xsin1/x-1/xsinx） x----0 f(x)=xsin1/x 与 f(x)=1/xsinx 他们在取极限时,趋于0与趋于无穷大的值与区别,求详解, I can give you any help if you need怎样翻译 对朱自清的《春》中的草的评价注意!是对写草的部分的评价主要写评价、要具体,急 Neighbors can usually help us a lot when we need help.怎样翻译