题目

At a rough estimate, Nigeria is ____ Great Britain.    A. three times the size as                      B. the size three times of    C. three times as the size of                    D. three times the size of   答案：D14．下列生活中的变化，属于物理变化的是（　　）A．铁钉生锈B．蜡烛燃烧C．食物变质D．矿石粉碎