椭圆设L为椭圆(x²)/4(y²)/3=1其周长为a,则∮L（2xy3x²4y²）ds=

已听英语用英语怎么写 clock如何造句 he wants to go to the zoo同义句替换 请介绍一下自己的城市的一年四季的情况.包括天气,衣着和活动. 蚁酸(HCOOH)能除铁锈吗 用甲酸和氨水如何配制四蚁酸铵? can,he,to,the,go,cinema怎样排列 can,he,to,the,go,cinema怎么样连成一句话 can he to the go cinema 怎么拼 tima、it to 、to、go、the、 cinema、is连词成句不要漏词，不要填词 some babies和want a go的中文意思 I want us to go on a good的中文意思 排列组合 Flipping a fair coinFlipping a fair coin.Assume that the coin is flipped 7 times.What is the probability that both heads and tails occur?Thank you~ 请问“Do you want a go? There are a lot of _______（difficulty ）that have to be overcome.横线内应该用什么形式的单词?急 英语翻译rfair skinfair weather 让生命与()拥抱 When college students are caught ________ in exam,they can be kicked out of school.应该填什么,为什么,请详细点呵呵,对了 它给的词是cheat 填哪种形式呢？ 《感知生命与拥抱责任》的演讲作文 替罪羊、铁公鸡等所含的寓意 both in the living foom and the bedroom什么意思 i bought it when i was living in the china,为什么这里要用was living 来表达? Tomorrow belong to our commemoration 10000 years ago ,the world's population was very s 英语自我介绍自己,和如何爱上英语的,关于自己与英语的故事 信度与效度分析使用原始数据做还是用统计出来的平均值做? 怎么样评判一组数据的可信度若有两组数据,怎么比较哪组更可信 两组对象相同的不同数据可信度怎么判断现在我就是要进行在针对同一对象的两组不同的数据判断那组跟可信. 英语翻译 英语翻译谁告诉告诉我红警2里说的英文都是啥意思,主要要有任务刚刚时说的那个什么“THE 撒bou shing bai nong feel control stand by ”(我自己安听的音,都是拼音),是啥意思额……………… 英语翻译我想听听看. friends like you make it easier to get alone in a new place还有I was having a hard time finding it until you came along和You could help with cleaning and cooking.怎么翻译