若将下图(a)所示的无向图改为完全图，则还需要增加（1）条边

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问题单项选择题

若将下图(a)所示的无向图改为完全图，则还需要增加（1）条边；下图(b)的邻接矩阵表示为（2）（行列均以A、B、C、D、E 为序）。

1（）

A．1

B．2

C．5

D．15

答案

参考答案：C

补全对话，情景问答

完成对话：

Daniel: Which is your favourite 1 ?

Simon: I think I like the Mid-Autumn Festival best.

Daniel: Why do you like it?

Simon: 2 I like to eat mooncakes. What 3 you?

Daniel: I like Halloween.

Simon: Why?

Daniel: Because we can play a game 4 “trick or treat” on that day. We always 5 up as ghosts. We wear

special costumes with masks.

1. ____________ 2. ____________ 3. ___________ 4. ___________ 5. __________

单项选择题

轴瓦的修理主要是针对（）轴瓦的损坏进行修理。

A．薄壁

B．厚壁

C．衬套式

D．三合金