阶跃函数的拉氏变换

独特的世界十城是哪十城?各位朋友帮个忙! 世界各地英文名 10031元用逗号隔开是怎么表达啊价格转化精矿产量计算 同位语从句会不会用逗号隔开帮忙分析个英语句子 he often （wait）for me at the gatehe often （wait）for me at the gate after school. I have came here for the first time这句话对吗?怎么说起来别扭呢 为什么often wait for me at the school gate often这个频率副词后加了wait的动原 可My father 是第三人称 关于《读者》的赞美词 where( )you last night?I( )a film in the cinema.A were,watched B was watched C are watch 志成 如何音译英文名较好?志成 如何音译英文名较好,注意是要音译 有关time的英语成语成语里含time 的 They are twins,so they are（They are twins,so they are（ ）他们俩是双胞胎,因此他们一样大. 雅思作文如何提高!考了两次,都是6分,第一次阅读7,听力6.5,口语6,写作5； 第二次阅读6.5,听力7（而且考试中发生了突发状况,耳机突然坏了）,口语6,写作5.第一次确实觉得写得不太好,可能大作 雅思作文怎样提高?作文用模板写听说不会得高分, 请问一下雅思作文怎么才能提高?雅思作文是个问题~ Time TIME FLIES They are twins.（翻译） 求大神批改雅思作文~能告诉我大概的分数和需要努力的方向吗?作文题目是：Some people think university education should prepare students for employment while others think I should help students acquire theoretical knowledge 雅思作文 帮我批改下~~谢谢啦~（给个分数,怎么提高呢?）The belowing table shows us the percentage of different categories of families living in poverty which was in Australia in 1999.The table gives us six types of the family. 求大神看看我的雅思作文 大约能得多少分数?哪里需要修改! The graph illustrates the number of people at a londen underground station between 6:00 and 22:00. We can see from the graph that the number of people was 100, which i 你的前女友对你说有谁会在时过境迁之后还在那里等你意味着什么 Run-time error75:Path/File access error If they also fall into water, I'll save first I love him.意思 翻译He is more than / over / at least / not less than 20. 雅思作文复议成功率成绩L 7 R 7.5 S 6 W 5.5.自己觉得作文没有偏题,应该可以有6吧.读硕士,需要6.5 min6呀.有必要复议么?成功性大不?考第2次了。。上次作文也5.5，但是是偏题的。。我的小作文以 我的雅思作文复议能成功吗? when the bus stopped,a boy -----------------------.got it on;B.got on it 我雅思作文5.5要不要复议呢?我觉得我的作文水平差不多6.5左右的 另外口语5.5复议成6分可能性大么?我感觉我口语水平也就5.6（主要是为了复议作文）但是我口语part2和part1都回答的不错的.part When they got to the t_____ of the hill,they stopped. 关于雅思作文复议我是2013年6月考的雅思 成绩总分7 L8 R8 W5.5 S7 感觉自己的写作成绩有点太低了 我对自己的思路 结构 用词等等都很有信心 唯一不确定因素就是字数 因为当时时间紧 两个作文 I ____(wait)at the bus stop when a car stopped.