题目

Imagine a world in which there was suddenly no emotion--a world in which human beings could feel no love or happiness, no terror or hate. Try to imagine the consequences of such a transformation. People might not be able to stay alive: knowing neither joy nor pleasure, anxiety nor fear, they would be as likely to repeat acts that hurt them as acts that were beneficial. They could not learn: they could not benefit from experience because this emotionless world would lack rewards and punishments. Society would soon disappear: people would be as likely to harm one another as to provide help and s13．一根原长为10cm的弹簧，挂上5N的钩码时弹簧长度变为12cm，当改挂上10N的钩码时弹簧仍在弹性限度内，则弹簧的长度变为（　　）A．13cmB．14cmC．16cmD．24cm