题干
—Can I watch TV now?
—No, you _______. It's 10 o'clock. You _______ go to bed.
A：can't; can
B：can't; must
C：may not; can
D：needn't; must
答案(点此获取答案解析）
B
在点
处的切线与坐标轴围成的三角形面积为