According to ______ new law, China will set up compulsory standards on food safety, covering ______ wide range from the use of additives to safety and nutrition labels.

A．the；a

B．a；a

C．a；the

D．the；the

电网调度自动化设备通过（）接口与GPS设备连接，与卫星系统对时。

A、RS－232；

B、RS－485；

C、RS－422；

D、RS－423。