交货率是指实际交货占全部订货数的比例。
参考答案：错
It was____of them to have sent the old people and children to safetyin case the flood destroyed
their village. A energetic B considerate C fortunate D patient
DMS的控制功能应具有控制（）
A.线损功能
B.发电成本功能
C.切除故障点功能
D.频率功能
