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【单选题】
下列关于图的存储表示的叙述中,哪一个是不正确的?A.
无的相邻矩阵是对称矩阵
B.
对于带权的图，其相邻矩阵中值为1的元素，其值可以用边的权替
C.
用邻接表法存储包括n个结点的图需要保存一个顺序存储的结点表和n个链接存储的
D.
用邻接表法存储包括n条边的图需要保存一个顺序存储的结点表和n个链接存储的
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举一反三
【单选题】The time and effort he has devoted during the past few years ______ trees in that remote area is now considered to be of great value.
A.
plant
B.
planting
C.
to plant
D.
to planting
【单选题】_______ refers to the time and effort spent learning the rules of a new market.
A.
First mover advantages
B.
Strategic commitments
C.
Pioneering costs
D.
Market entry costs
【简答题】打下课铃后,学生起立,齐声向老师说()。若有听课老师,应()方可自由活动。
【单选题】The time and effort he has devoted during the past few years trees in that remote area is now considered to be of great value .
A.
to planting
B.
to plant
C.
plant
D.
planting
【判断题】Outsourcing is a logical choice when a firm does not have certain expertise and is unwilling to invest the time and effort to develop it.
A.
正确
B.
错误
【多选题】在下列各种凭证中，属于在交易或事项发生时不能直接取得或填制的原始凭证有
A.
. 一次原始凭证
B.
累计原始凭证
C.
汇总原始凭证
D.
收款记账凭证
E.
重编原始凭证
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