设G=<;V,E>;为无向图，u,v∈V，若u,v连通，则( )
A: d(u,v)>;0
B: d(u,v)=0
C: d(u,v)<;0
D: d(u,v)≥0
A: d(u,v)>;0
B: d(u,v)=0
C: d(u,v)<;0
D: d(u,v)≥0
举一反三
- 设G=<;V,E>;为无向图,[img=52x21]17e0ab1cfb60906.png[/img],若u,v连通,则( ) A: d(u,v)>;0 B: d(u,v)=0 C: d(u,v)<;0 D: d(u,v)≥0
- u、v为点对应三角形的重心坐标，以下哪种情况为点在三角形内部 A: 0 <= u <= 1 且 0 <= v <= 1 B: 1 <= u 且 1 <= v C: 0 = u 且 0 = v D: 0 >= u 且 0 >= v
- $u$, $v\in E^3$, $u=(0,-1,1),v=(1,-1,-1)$. What is $||u \times v||^2$:<br/>______
- $u$, $v\in E^3$, $u=(0,-1,1),v=(1,-1,-1)$. What is $\langle{u,v}\rangle$:<br/>______
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