题干
— It rained heavily yesterday. Did you get wet ?
— Quite lucky, ______ got on the train when it poured down.
— Quite lucky, ______ got on the train when it poured down.
A：no sooner had I
B：I have no sooner
C：hardly had I
D：scarcely I had
答案(点此获取答案解析）
C
的定义域为
，值域为
，则在平面直角坐标系内，点
的运动轨迹与两坐标轴围成的图形的面积为
