A.将氢氧化钠溶液滴入氯化铜溶液中,有白色沉淀产生 |
B.将生锈铁钉放入稀盐酸中,有气泡产生,溶液为蓝色 |
C.将蜡烛放入盛有氧气的集气瓶中,蜡烛即刻燃烧火焰明亮 |
D.将少量硝酸铵和熟石灰混合后研磨,产生刺激性气味气体 |
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