哄的读音及组词-查字典问答网
- 观察下列等式:1×2=13×1×2×3,1×2+2×3=13×2×3×4,1×2+2×3+3×4=13×3×4×5,…,照此规律,计算1×2+2×3+…+n(n+1)=______(n∈N*).
- 因式分解1.(v-2u)^2-(2u-v)(u+2v)-2v+4u2.2x(-1+2y)-6y(2+y)(2.这道题没有公因式,是不是expand后才分解?)第一道题详解!
- TeafarmersinKenyaaresufferingbecauseoflowpricesfortheircropthisyear.Sotheyhaveexchangedtheirteabushesforahealthynew"purpletea"thattheyhopeillsellforahigherprice.Butthefarmerswhoplantedthebushesare
- 英语翻译
- 英语翻译读了这本书,还知道做了好事神会奖励于你.可是,你要是做了坏事,神会降罪于你的.我感悟出“善有善报,恶有恶报,不是不报,时候未到”.说的是你做了善事,你会得到好运和善果,而你
- 德语中反义疑问句(是这么说么)比如MachenSiekeinenSport?---Doch,ichmacheSport.或Nein,ichmachenichtSport.类似的问句,其中如果用后者回答的话,是不是nein和nicht必须同时存在这个句子中?
- 求以Y开头的,唯美单词...
- 一个长方形的长为xcm.周长为30cm.如果长减少2cm,宽增加1cm,那么这个长方形就形成了一个正方形.由此可得方程_________.
- 【ExplaintheeconomicimplicationsfortheUKofentryintoEuropeanMonetaryUnion.】
- -wouldyouliketogoswimmingintheriverwithus?-sorry,Idon'twanttogo.Ourteacheroften-wouldyouliketogoswimmingintheriverwithus?-sorry,Idon'twanttogo.Ourteacheroftentellsus____(do)that.谢谢麻烦了!