调度自动化系统改造工程中要充分评估UPS电源（），UPS负载超过要求时应同步开展UPS电源改造，实现系统与配套电源同步投产。

A.适应性

B.可靠性

C.灵活性

D.经济性

The _______ contract is a contract between a party who agrees to accept the risk and a party seeking protection from the risk

A．payment
B．production
C．shipment
D．insurance