题目

As any homemaker who has tried to keep order at the dinner table knows, there is far more to a family meal than food. Sociologist Michael Lewis has been studying 50 families to find out just how much more. Lewis and his co-workers carried out their study by videotaping(录像) the families while they ate ordinary meals in their own homes. They found that parents with small families talk actively with each other and their children. But as the number of children gets larger, conversation gives way to the parents’ efforts to control the loud noise they make. That can have an important eff 列竖式计算．0.57×23= 65×3.14= 0.38×0.2= 0.036×0.35= 0.39×0.15= 0.38×26= 40×2.7= 0.025×80= 0.208×375= 205×1.04= 5.96×150= 16×0.125=