透镜成像公式

be的过去分词 be+过去分词怎么确定be是is还是are还是were还是was? be过去分词 GAIN什么意思 为何百慕大三角时常有UFO出现 英语翻译翻译出来的意思要贴切,不要在线翻译的!Here comes a vacation,a new year and also a new begining~What I gonna do is using every bit of my potential to fulfille my promise,little by little and bit by bit.'cause there's no goin 英语翻译You're waiting for a train - a train that will take you far away.You know where you hope the train will take you,but you can't know for sure.But it doesn't matter,because we'll be together. 直接引语变间接引语 时间状语从句 宾语从句与间接引语的关系Q1：间接引语都是宾语从句,而宾语从句不一定是间接引语,Q2：间接引语的时态变化与宾语从句一样吗?Q3：宾语从句中若表示客观真理,时态一律用一般现代时,间接 宾语从句与间接引语 小六英语连词成句和中文连词成句：get.up.from.ground.the.himself.suddenly.ground.the.by.并翻译中文!Thank you! 连词成句5题,小六英语孩子自学卷. 西辽德宗（菊儿汗）耶律大石,是怎么样在中亚西亚建立起一个庞大的西辽帝国的? 第六大题第一小题,连词成句.小六英语自学卷. 西辽灭亡之后的中亚局势是?可敦城和虎思斡耳朵在现在的什么地方?耶律大石西征路线是? 西辽在什么地方?这个地方在耶律大石去以前属于什么国家? 耶律大石西辽和金耶律大石想进攻金,但是得穿过沙漠.既然在西边已经那么牛逼了,为什么不绕道西夏,把西夏灭了或者降服再去进攻金,这样就不用穿过大沙漠了 12世纪初,契丹人耶律大石在西域建立西辽政权,哪种宗教依然盛行 In math class,our teacher often makes us ____ a problem.A.to argue with B.argue with C.to argue D.argue for what a good,kind 问:西辽建立的时间,人物,存在的时间,等. 历史上的西辽在今天的哪里?西辽的地理位置在今天世界的哪里? 画圈题求句子结构分析 历史话题.西辽由谁建立 历史上的西辽是谁、怎么建立起来的?西辽的由来 这个句子结构有问题吧 23.She's upstairs_______letters.A.writes B.is writing C.write D.writing 高中英语句子结构? Li Lei didn't listen to the teacher carefully when the teacher t___ English in class. The teacher didn't tell me ____to read after class.A.thatB.whatC.butD.as 4.Does she need (do) homework at once? 分析一个句子The hardworking blacksmith Jones used to work all day in his shop and so hard working was he that he was thought highly of.重点是and之后的半句,那个so hard working was he是什么语法现象呢? 百慕大和UFO有关联么?