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[简答题]Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life. Youth means a temperamental predominance of courage over timidity, of the appetite for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20. Nobody grows old merely by a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul Worry., fear, self-distrust bows the heart and turns the spring back to dust. Whether 60 or 16 years old, there is the lure of wonder, the unfailing childlike appetite and the joy of the game of living in eve~. human being’s heart. In the center of your heart and my heart there is a wireless station: so long as it receives messages of beauty, hope, cheer, courage and power from men and from the Infinite, so long are
[单项选择]Youth is a state of mind, not a matter of rosy cheeks or red lips; it is a matter of the will, a quality of the imagination.（）
A. 青年向往的不是红润的容颜，而是意志的坚定与想象的敏锐。
B. 青春不是朱唇红颜，而是心理状态，是意志与想象力的体现。
C. 青春不是朱唇红颜，而是一种思想，是意志与想象力的体现。
D. 青春在于表达心声，不在于红润的容颜，尽在于意志与品质。
E. 是否青年在于心态，不在于红润的容颜，全在于意志与品质。
[填空题]
Time in the Animal Mind
Humans are born time travelers. We may not be able to send our bodies into the past or the future, at least not yet, but we can send our minds. We can relive events that happened long ago or imagine ourselves in the future. New studies suggest that the two directions of time travel are intimately twisted together in the human brain. But some experts on animal behavior do not think we are unique in this respect. They point to several recent experiments suggesting that animals can visit the past and future as well.
The first clues about the twists and turns of mental time travel came from people with certain brain injuries that caused them to forget autobiographical details without forgetting the information they had picked up along the way. A man known as K. C. , for instance, could play chess with no memory of having ever played it. K. C. could remember sentences psychologists taught him without any memory o
