【答案解析】{{B}}This is a circle graph of the energy used in American families.{{/B}}
From the circle, we can see that space heating takes up the most energy consumption, it accounts for 48 % of the total amount of energy. The second largest portion of energy(18%)is used for lighting, cooking, and running appliances. This is followed by water heating which expends 14% of the total. Refrigeration almost ranks the same as water heating, which is 13% of the whole amount of energy use. Among these energy consumption items, space cooling comes up to be the lowest, 7% of the whole. This circle shows that the largest portion of energy is spent on space heating. This puts us into deep thinking.
If we can find ways other than the present regular energy sources to supply family need for energy, then we can save up the traditional energy sources such as coal, electricity, wood, etc. Solar energy might be a good answer to this problem. Therefore, more efforts should be made and more money should be spent on the research in this area. More people should be encouraged and supported to work on this issue. Maybe someday they can really enable us to enjoy the comforts of solar energy.