A.“明矾净水”“卤水点豆腐”“血液透析”都与胶体的吸附性有关 |
B.“雨过天晴云破处,这般颜色做将来。”所描述的瓷器青色来自氧化铁 |
C.绚烂的烟花是利用某些金属元素的焰色反应,焰色反应属于化学变化 |
D.生活中常备杀菌消毒试剂有“84”消毒液、漂白粉 |
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