资讯

CNET on MSN2 小时
Do These 5 Simple Things Every Day and You Might Actually Feel Human Again
"The science shows that our circumstances -- how rich we are, what job we have, what material possessions we own -- these ...
BBC9 小时
What are the properties of 3D shapes?
A negative buzzer goes when zero is scored. NARRATOR: Finally, what about the sphere? So, faces? Well, just the one. Edges? Zero. Vertices? None. Oh dear! Oh well. The spheres are disappointed and ...