生物高二必修2

(正3又4分之3)减(负2又4分之3)等于多少 根据汉语提示填上单词1 It looks great,but if anything goes wrong it can be a _______( 大灾难 )2 The quickest __________( 方式 )of travel is by plane.3 He owns nothing beyond the ________( 破旧的 ).4 The soap ___________( 滑落 )out 根据首字母提示填上合适的词（英语)It was two o'clock.A train stopped b___two stations.It was very hot.O____the train there w___a boy.His name was Tim.He was afraid. 根据提示写古诗词. 根据提示写诗句? 280°防火阀与排烟防火阀的关系请问280°的防火阀与排烟防火阀是不是就是同一个东西.不是的话两者什么区别.208°防火阀平时是关闭还是开启的.ps：自己感觉两者是同一个东西.防火阀只有70° 根据汉语提示写单词 地下铁道系统中,有防烟防火阀和排烟防火阀,两者有什么区别,包括安装点、控制方式、开闭状态、用途? 3^2+（4-x）^2=x^2请高人帮忙计算,尤其平方根的算法. 防火阀和排烟防火阀的区别是什么?是什么关系?我自己想的：防火阀平时是常开,70度是自动关闭.排烟防火阀是70度打开,但是打开了排烟后烟雾怎么能排出去呢,之前防火阀已经关闭了吗?为什 防火调节阀和排烟防火阀有什么区别 双曲线 36分之x的平方- 21分之y的平方=1 的顶点坐标为________ y=(x+2)的平方的顶点坐标 （1-X的平方）/x 图像的顶点坐标怎求?最好有公式, y=x平方-x-2的顶点坐标是什么要先化成y=a(x-k)²+m的形式的 排烟防火阀和消防正压送风口阀门的区别?怎么看着都一样? 在括号里填上恰当的词语 ( )的家 ( ) 地长大 ( )的工人 ( )的教师. 什么样环境,填上合适的词语 雪花像什么,填上合适的词 4(x-3）平方=36（3x+8）平方-（2x-3）平方=0 英语翻译Never Gonna Be The Same- Courtney LoveNever Gonna Be The SameCalled me up todayShould've stood in your wayYou liedAnd everywhere a dreamNothing came betweenI diedGive me a wayI will not bleed for youGod comes downNever gonna be the sameNe 求Jessica Mauboy的Never be the Same中文歌词Let me tell you about a girl that I used to be,Same name same face but a different me,She didn't know what she was thinking,Didn't know her world was sinking,Had her dreams written on a paper in her ha Never be the same again要歌词和翻译, 英语翻译Come on.Ooh,yeah.Never be the same again.I call you up whenever things go wrong.You're always there.You are my shoulder to cry on.I can't believe it took me quite so long.To take the forbidden step.Is this something that I might regret?(C 《i"ll always be the same for you》英文歌词 （x+1)二次方=36求X 什么是快乐的真正含义? 照样子填上合适的词( )雪花是飘雪花 照样子在( )里填上合适的词例 悠(闲) 悠（ )写2个例 （ )期 期 写2个 燃烧舞池 BURN THE FLOOR怎么样 ____ ____the floor sweep the floor和 mop the floor 区别