试题题干
Fill in the blanks with one of the items given.
Energy efficient products 
from light bulbs, half the normal amount of energy to computers or TV sets that power down when not in use.
参考答案
正确答案：![]()
Fill in the blanks with one of the items given.
Energy efficient products from light bulbs, half the normal amount of energy to computers or TV sets that power down when not in use.