红球 | 蓝球 | 黄球 | |
淘气 | 19 | 10 | 1 |
笑笑 | 18 | 20 | 0 |
袋子里各种颜色球的数量,下面不可能的情况是( )。
A.红球19个,蓝球10个,黄球1个 |
B.红球18个,蓝球12个,黄球0个 |
C.红球18个,蓝球10个,黄球2个 |
D.红球20个,蓝球10个,黄球2个 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2