I arrived in Dayton as science master and football coach at the secondary school. This sentence is ungrammatical. The correct one should be that " I arrived in Dayton as a science master and football coach at the secondary school."
【简答题】关于生产函数Q=f(L,K)的生产的第二阶段,应该:( )。A. 开始于AP L 开始递减处(即AP L 的最高点),终止于MP L 为零处; B. 开始于AP L 曲线和MP L 的相交处,终止于MP L 曲线和水平轴的相交处; C. 开始于AP L 开始递增处,终止于MP L 递减处; D. 开始于AP L 开始递减处(即AP L 的最高点),终止于AP L 开始递增处。