-WhatelsedidTinaaskyouaboutthetriptoNanjing?-Sheaskedme.()A.whowastheguideofthetripB.whentheywillvisitthePresidentialPalaceC.howlongwouldtheystayatNanjingMuseumD
-What else did Tina ask you about the trip to Nanjing?
-She asked me ______.( )
A. who was the guide of the trip
B. when they will visit the Presidential Palace
C. how long would they stay at Nanjing Museum
D. if she can go to Nanjing University alone on the second day
设A是n阶矩阵A^2=E,证明r(A+E)+r(A-E)=n,的一步证明过程不懂由A^2=E,得A 2020-05-14 …
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可以参考的公式是:s[1]=a[1];s[n]=s[n-1]>=0?s[n-1]+a[n]:a[n 2020-05-14 …
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如图,某地要在一座小山的东西山麓E,W两点相对开凿出一条贯通的隧道,为了测量隧道的长度,在W的正西方 2020-12-05 …