下列哪个理论不是演绎的来的（）
A、四元素说
B、牛顿力学
C、爱因斯坦相对论
D、狄拉克的量子理论
参考答案：D
–Anyone in mind for this position? What about Jack?
--He may be a good friend, but business is business. He is not _____ man for _____ job.
A．a; a
B．the; the
C．a; the
D．the; a
氮源
