极坐标算二重积分例题

3个选择一个填空 一份数学竞赛的试卷一共有30道题,小红做对了其中的24道,做对的题占总数的几分之几,做错的题占总数的几分之几? had/have/has gone/been 的区别如题了我问几个问题has gone 和have gone 的意思和用法都是一样的吗``还是其中一个不存在has been 和have been 也是一样同上问题还有had gone 和 have/has gone 有什么区别``要有 have/has gone to和have/has been to有什么区别? have been to和have gone to 的区别和用法!关于”语法”方面”意思”方面”用法”方面等 have been to与have gone to有何用法区别?最好是把用法详细说一下 .有例子最好 have been in have been to have gone to用法have been in和 have been to和 have gone to的用法 你想要知道关于我的早晨吗英语怎么说 准备好了吗 什么时候出发 用英语怎么说大概是怎么发音哈? 小红参加数学竞赛,做对了18题,做错了2题,小红这次答题的正确率是百分之几 小红参加数学竞赛,共有20道题,每做对一道题得8分,做错或不做一题扣4分,小红共得100分.她做对了多少题? 英语句型转换求解!. 求解英语句型转换we Iooked forwared to his early arrival we became disappointed怎么换成 the more the more 句型 英语句型转换 1.i think a school newspaper should focus on what happens on campusi____ _____ ____ that a school newspaper should focus on what happens on campus2.if you are not at the station by 5 o'clock,you will miss the bus____ at the station 英语句型转换求解答 人们往往赋予一些花木以某种象征意义,有哪些说法 人们往往赋予花木以一些象征意义,搜集几种说法只要几句话 人们往往赋予一些花木以某种象征意义,试着收集几种说法 人们往往赋予一些花木某种象征意义,试着搜集几种说法 Those that have gone have gone for good,those to come keep coming.Those that have gone have gone for good,those to come keep coming还有May there be enough clouds in your life to make a beautiful sunset. 人们往往赋予一些花木以某种象征意义,试搜集几种说法 Those that have gone won't come back again ,the coming back are no longer prefect. 英语翻译..好人一生平安 gone perfect 翻译下这两个. 英语翻译整首歌里的英文都要翻译 某次数学竞赛,试题共有20道,每做对一题得5分,每做错一题倒扣3分.小军最终得76分,他做对多少题?要算式 一次数学竞赛,小明做对的题占题目总数的4分之3,小红做错了7道题,两人都做错的题数占题目总数的5分之1,小明做对了多少道题?请写清楚,最好用算数的方法,OK? 一次数学竞赛共20道题,小军做对一道得5分,做错一道倒扣3分,小军正好考了60分, you have just come back your hometown为什么不用came he is just _____ back from the USA.A.came B.coming C.come D.to come再麻烦讲讲有没有was just to do 的说法,这和过去将来是有联系吗? come,came还是have come?“我来这是为了应聘”这句话中是用以上的哪一个,理由要充分答案是have come有没有知道为什么的？ I have just come back.是现在完成时吗?如果是,那come为什么不用过去分词?