【简答题】What is time? Is it a thing to be saved or spent or wasted, like money? Or is it something we have no control over, like the weather? Is time the same all over the world? That's an easy question, you ...
【简答题】In the 80s, a talking car like knight rider's kit was pure fiction. "My electronic sensors picked up a destination signal..." Not anymore. Modern cars are really computers on wheels. "You often hear t...
【简答题】Smaller than 1 , your 2 just goes on and on. It will 3 a minute for 70 years or more. That's something 4 most of us take for granted. But it's 5 . And, 6 , your heart does 7 without ever complaining!...