题目

下列物体的质量与一间普通教室内空气的质量最接近的是（已知空气的密度为1.29kg/m3）（ ） A . 一个苹果 B . 一名中学生 C . 一头牛 D . 一辆家用轿车 答案：CHe was a single father, raising a 5-year-old boy alone. He worried about his son growing up without a mother to care for him.One day he went away on business, leaving the child alone. He was worried about the child all the way, not knowing if he had eaten. But his child always told him not to worry. He went home quickly after finishing his work.When he got home, the child was deep asleep. He was tired out. When he was about to sleep himself, he was surprised to find an overturned bowl of noodles under the quilt. He spanked his sleeping son angrily:"Why are you so naughty, making the quilt dirty? Who will wash it?" It was the first time that he had hit his boy after his wife's death."I haven't," the boy explained with tears in his eyes. "This is your supper, Daddy." In order to let his father eat dinner as soon as he got home, the boy cooked two bowls of noodles: one for himself, the other one for his father. He was afraid his father's noodles would get cold, so he placed them under the quilt to keep them hot.Hearing this, the father hugged his boy tightly without saying a word1.According to the passage we know the boy only had _________A.a grandfatherB.a motherC.a fatherD.a grandmother2.The single father was always worried about ______A.his workB.his moneyC.his sonD.his quilt3.When the father got home , __________________________A.His son wasn't at homeB.He was tired outC.His son was doing his homeworkD.He was very happy4.When the father knew the truth, _________A.He hit his sonB.He was very upsetC.He hugged his son tightlyD.He went outside