【简答题】Scientists have devised a way to determine roughly where a person has lived using a strand of hair, a technique that could help track the movements of criminal suspects or unidentified murder victims....
【单选题】So far as I know, Miss Hannah Arendt was the first person to define the essential difference between work and labor. To be happy, a man must feel, firstly, free and, secondly, important. He cannot be ...
【单选题】The author asserts in this article that the world we perceive through touching is different from what our eyes see, and the sense of touching can help increase accuracy in recognition.