题干
— I don't know when ________ tomorrow.
— I will call you as soon as he ________.
A：will he come; arrives
B：he will come; arrives
C：he will come; will arrive
D：will he come; will arrive
答案(点此获取答案解析）
B
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
