By this time tomorrow, the ship ()its repair work in the engine room.
A. will do
B. has done
C. had done
D. will have done
产品数量主要取决于机器性能的行业适合使用计件工资制。
A. 正确
B. 错误
在MPLS上传送以太网帧,其封装模式是什么?()
A. Packet mode
B. Frame mode
C. Transparent mode
D. Channel mode
从卖方的角度来看,房地产的价格是基于其过去的"生产成本",重在过去的投入。()
A. 正确
B. 错误