年夜学英语测验精读：第四册（UNIT2） Is there anything we can learn from deer? During the "energy crisis" of 1973-1974 the writer of this essay was living in northern Minnesota and was able to obser... / 2010-06-08 / 查看 14 次

年夜学英语测验精读：第六册（UNIT10） Do animals think? How could the earth show so many signs of design and purpose and yet be random? Our best scientists are heatedly debating both sides of these ... / 2010-06-08 / 查看 5 次