收敛级数加发散级数

怎么算做的功,需要算动能吗?请详细点说。比如在恒力做功情况下，力没有后仍要移动一段距离，算功时要算动能吗？还有瞬时力做功，要算动能吗？如何算？帮忙解释下，谢谢 功越大可以认为就是能量消耗越大吗?功的计算有没有一个形象点的比喻啊?公式是W=FS,力乘以距离是个什么概念啊?太抽象了吧,有没有形象点的比喻之类的啊,我感觉有点像消耗的能量,就像是 So popular a place is Disneyland in Hong Kong ——many children want to go to a second time.为什么 填as shakespear ever said,to be or not to be,that's a question. 高中英语中有什么动词不具备延续性?比如：He has got married for ten years就不行 要将got改成been 用F和v可以判断功W是正功还是负功,怎么判断啊,是不是跟功率有关啊是不是与F和v的夹角有关啊，又与F与S的夹角有关，关键是S和v不一定在一个方向啊 Fill in the bianks with is or are是什么意思 急!~~~· 根据首字母,汉语填空.I bou ght _a________ (纪念物) yesterday. code of ethics 如果是“业务准则”,那它和 code of conduct 有什么区别? Has the Code of Ethics been translated into the local language? 英语翻译living in accordance with the Code of Ethics is the happy life.怎么翻译这句话? That boy was very interested.翻译 have big shoes to fill 翻译"Studies show that the cold or the flu virus can live on our hans for long. "So you should wash your hands often with soap and warm water. This could be the result of a damaged ,a failed download or a virus. 小米2s手机gps无法卫星定位是什么原因 I am very interested in Mark Twain'a novels,___A.aren't I B.am not I C.aren't you D.are you为什么选A 速求..不要说答案全错..就是选A 但我不知道为什么 红米手机用百度导航为何老是卫星定位不成功 the young students like ___and Mark ___novels very much.A:DICKENS,Twain'sB:DICKENS',Twain C:DICKENS'S,Twain's d:DICKENS',Twain's the young students like Dickens' and Mark Twain's novels very much I'm interested in reading novels.I think Harry Potty is very____.A.interested B.crowd C.interesting D.quiet选择 首字母填空; 请附中文Kitty and Alice are o( ) Green R( ). There are some c( ) on the road. A lady wants to s( ) a postcard .But she doesn't know where the post office is . She asks Kitty and Alice .The girls c Fill in the blanks.Help to have a look!1.let's _____ for a walk,shall we?a.to go b.going c.go d.gone2.It took me two weeks _____reading the novels written by Guo Jingming.a.finish b.to finish c.finishes d.finishing3.I like soft and gentle music.It __ Fill in the blanks.填空,填补.（have和has的转换）They____ ____(not have)a radio.Our house_____(have)a nice garden.Our city ____(have)a nice park.I ____(have)a CD player.Lucy____ ____(not have)a car.She has a bike. Professor Wang gave us some useful advise ,would you like to____it?A.hear .B.take我选的是A,是错误的.为什么错?答案B为什么是对的?翻译这句话. I miss you as well.And for the record,I really value our friendship and hope you do too.帮我翻译下, 1) We ,【the Chinese people】,value friendship.【】中的是……?2）Some people take the view【that a newspaper is like a store with many windows】.在【】中,that是否充当句子成分?that在整个句子中有何作用?给【】中的 You want the most precious good friendship Write about a friend.It can be a friendship you have now,or a friendship you had in the past.1.Describe your friend.How did your friendship start?2.What made your friend so special?3.What did you do together to have fun?4.How did your friendship end? 三道英语首字母填空 1.The little boy likes to s---- his apples with the little girl2.The boy has been missing for three days.Everyone is worrying about his s---------.3.Work hard ,and your f-------- is not a dream. 世界最大的黄土堆积区是? 数控加工中心怎么实现改动一把刀的测量长度余下的刀具一起改变