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【单选题】
若从无的任意一个顶点出发进行一次深度优先遍历便可以访问该图的所有顶点,则该图一定是一个( )图。A.
非连通
B.
连通
C.
强连通
D.
完全
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反馈参考答案：
举一反三
【单选题】2 Question 1 to 3 are based on the conversation you have just heard.
A.
Air pollution
B.
Agriculture
C.
Industry
D.
Water
【单选题】3 Question 1 to 3 are based on the conversation you have just heard.
A.
Industry
B.
Cars
C.
Factories
D.
Agriculture
【单选题】1 Question 1 to 3 are based on the conversation you have just heard.
A.
Mine
B.
Gold
C.
Environment issue
D.
Water
【单选题】在ZigBee网络中存在三种设备类型：协调器、路由器和终端设备，但是在ZigBee网络中只能有一个（ ），可以有多个（ ）和多个（ ）。
A.
路由器、协调器、终端
B.
协调器、终端、路由器
C.
路由器、终端、协调器
D.
终端、路由器、协调器
【简答题】ZigBee 网络中有三种类型的节点,分别是()、()和 ZigBee 终端节点。
【单选题】Conversation 1 Question 9 to 11 are based ont the conversation you have just heard. question 9.mp3:
A.
She had a job interview to attend.
B.
She was busy finishing her project.
C.
She had to attend an important meeting.
D.
She was in the middle of writing an essay.
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