A.抛硬币,正面朝上,小明先走;反面朝上,小华先走 |
B.投骰子,点数大于3,小明先走;点数小于3,小华先走 |
C.点数为1和2的扑克牌各一张,反扣桌面,每次摸一张,然后放回去。点数为1,小明先走;点数为2,小华先走 |
D.红球、白球各2个,放入袋中,每次摸一个,然后放回。摸到红球,小明先走;摸到白球,小华先走 |
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