X | Y | Z | Z中实验现象 | ||
A | 浓硫酸 | 蔗糖 | 品红溶液 | 褪色 | |
B | 饱和食盐水 | 电石 | 溴的溶液 | 褪色 | |
C | 饱和溶液 | 溶液 | 溶液变浑浊 | ||
D | 浓氨水 | 生石灰 | 溶液 | 有蓝色絮状沉淀 |
A.A | B.B | C.C | D.D |
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