题目

Is this factory ______you visited last week?A. that B. where C. the one D. in which 答案：【答案】C【解析】句意为：这是你上星期参观的工厂吗？从句，指物体那个.这个，the one,故选C。冰的密度是0.9×103kg/m3，体积是1m3的冰块全部熔化成水，水的体积是    m3．