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【单选题】
设一个包含N个顶点、E条边的简单有向图采用邻接矩阵存储结构(矩阵元素A[i][j]等于1/0分别表示顶点i与顶点j之间有/无弧)，则该矩阵的元素数目为(60)，其中非零元素数目为(61)。A.
E2
B.
N2
C.
N2-E2
D.
N2+E2
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举一反三
【单选题】why did the author tell her brother “make sure the band can play waltzes and polkas”?
A.
she wants to dance with her father once more.
B.
her father can only dance those music.
C.
she wants to listen to such kind of music in the party.
D.
few band can play Waltze and Polkers.
【简答题】肝阳上亢的护治原则是____。
【简答题】A. He wants to learn to play the violin. B. His band will perform. next week. C. He wants to play in the band. D. He can't play the violin well.
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