题目

 Kate is my good friend. She often _____ a smile _____ her face and looks happy.         A. wears; on     B. with; in          C. with; on       D. has; in 答案：A市场上出售的“金龙鱼”牌调和油，瓶上标有“5L”字样，已知该瓶内调和油的密度为0.92×103kg/m3，则该瓶油的质量是    kg．