Electricity generation consumes a lot of resources, saving electricity can save resources, protect the environment. Start saving from the everyday life, at home using the refrigerator, the power-saving approach is to
A.Put a lot of food in the refrigerator
B.Open and shut the refrigerator door repeatedly
C.In the refrigerator, placed in the side and behind the space set aside to help the refrigerator cooling.
D.Put the refrigerator and the microwave together