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【判断题】
一个稀疏矩阵A（m×n）采用三元组形式表示， 若把三元组中有下标与列下标的值互换，并把m和n的值互换，则就完成了A（m×n）的转置运算。A.
正确
B.
错误
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举一反三
【单选题】定义一个数组,代码如下: var arr = new Array(9); arr[0]=1; arr[2]=2; 该数组的length属性值为( )。
A.
1
B.
2
C.
9
D.
10
【单选题】I forgot to give my regards to my manger in my letter. I wish I _____ it.
A.
should do
B.
did
C.
have done
D.
had done
【简答题】定义一个数组,代码如下: var arr = new Array(9); arr[0]=1; arr[2]=2; 该数组的 length 属性值为 。
【多选题】What message in the following text can be delayed to create suspense? It was my girlfriend’s birthday. Early in the morning I told her that I forgot to prepare her birthday gift and would give it to h...
A.
The identity of my girlfriend
B.
The bus number
C.
The day being her birthday
D.
What gift it was
【单选题】有如下代码: var arr = new Array(9); arr[0]=1; arr[2]=2; 该数组的length属性值为
A.
2
B.
5
C.
7
D.
9
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