房地产开发项目建成时,按国家有关财务和会计制度,转入房地产产品的开发建设投资是指( )。
A.经营成本B.开发产品成本C.期间费用D.开发项目总投资
参考答案:B
—Why do you look so worried?
—My computer broke down and my essay ________ unfinished since.[ ]
A. had left
B. has left
C. was left
D. has been left
对纯金属而言,下列说法哪个是错误的()
A.不会在恒温下结晶
B.不会发生相变
C.都能进行形变强化
D.都能进行时效强化