错办或未及时办理信号致使列车停车，为一般B类事故。
参考答案：错
土地增值额超过扣除项目金额100%，未超过200%的部分，税率为( )。
A．30% B．40%C．50% D．60%
All the preparations for the task ___,and we're ready to start. [ ]
A. completed
B. complete
C. had been completed
D. have been completed
