直线y=-4x+k与坐标轴围成的三角形面积为8,则k=( )
±8
—What do you do?
—_________. [ ]
A. I'm thirteen
B. I'm a girl
C. I'm a student
D. I'm at work
“岁寒三友”和“花中四君子”分别指哪些植物