mma02040c6809fb300

用last造句 质量为m的物体静止在地面上,物体上面连着一个直立的轻质弹簧,弹簧的劲度系数为k,现用手拉住弹簧上端,使弹簧上端缓慢提升高度h,此时物体已经离开地面,求物体重力势能的增加量? 什么物质能瞬间将温度降低到负几十度甚至几百度,慎重回答这个对我很重要 怎样瞬间降低温度?使物体的温度瞬间降低 将don't forget to close the door when you leave..改为同义句[ ] [ ] colse the door when you leave. 上海师范大学附属中学英文怎么说 ——where did you find the group of children? ——It was in the woods＿＿they played hide-and-seek——where did you find the group of children?——It was in the woods＿＿they played hide-and-seekA.that B.where C.which D.when 为什么 Fiften children are playing hide-and-seek.If only five of them are found ,how many children haven'tbeen found? 拉力器的弹簧两边分别受100n的力弹簧伸长6cm,劲度系数怎么算?100n还是200n?说明原因 化学中什么物质能够降低温度? Most of the children are playing,while some are still doing their homework.(句型转换)Most of the children are ____ ____,while some are still doing their homework. The children are playing game ___ hide-and-seek.怎么填 Don't forget to close the door before you leave.（改为否定句）Don't forget to close the door before you leave.（改为否定句）_____________ to colse the door before you leave. some children are interested in playing computer games为什么还加are there are some children playing there.是有些男孩在嬉戏吗 科学家选择密度大还是小的合金,玻璃钢复合材料作为航天器材 请问各位高手,一般的玻璃钢密度多少啊? 玻璃钢的密度我想知道一个东西的重量,知道：长宽高分别是125、55、60,单位（厘米）厚度是3.5（毫米）,材料是191号不饱和聚酯树脂和中碱玻纤布,请问,该物品重量是多少?公式给我,厚度应该 The Wilsons live in_A-shaped house near the coast.it is_17th century cottage.A the,不填 B an,the C 不填,the D an,a 物体的温度上升或下降说明了() Please write---it English A on Bin C at D to at gate the shop south pet is 连词成句 同义句：My house is near my school. The pet shop is at the south gate.改为一般疑问句 The pet shop is____ the south gate.填一填 It is easy for you to get to school every day?怎么回答 every day it is easy to see advertisements in english all around us阅读答案 it's easy to see-----(advertise)all around us Don't forget __the window before you leave the room.A,to closeB.closingCclosedDclosewhy?// 推荐些四通道电动遥控直升机模型,不要玩具!要模型,不要玩具.五百块钱之内 Our House (Live) 歌词 I live in small house?就house提问 问句是什么