On receiving a phone call from his wife ______ she had a fall, Mr. Gordon immediately rushed home from office.

A．says

B．said

C．saying

D．tosay

一段冷却是酿造用水经氨蒸发器冷却至（）℃的冰水，与热麦汁在薄板冷却器内进行热交换，把麦汁冷却至（）℃，冰水被加热至80℃作酿造用水使用。