–Un, I’d like a hamburger, large chips and a small Coke with ice.

–________?

A.Can I help you  

B. For here or to go  

C. Anything to eat

通过电子化交易系统，进行实时、自动买卖的程序交易，以调整仓位，这种做法叫______。

A．静态套期保值策略
B．动态套期保值策略
C．主动套期保值策略
D．被动套期保值策略