美国新任总统奥巴马上台，第一位黑人总统，他会带来什么不同以往的经历呢？听写提示：Michelle
Mr. Obama is taking command of a nation at war and an economy in crisis. In his inaugural speech, he promised to begin again what he called, the work of remaking America."What is required of us now is a new era of responsibility – a recognition on the part of every American, that we have duties to …