A.铝的金属活动性比铁强,则铝制品比铁制品更容易锈蚀 |
B.水和过氧化氢的组成元素相同,则两者的化学性质相同 |
C.Na+、Mg2+、Cl-的最外层电子数均为8,由此得出离子的最外层电子数均为8 |
D.同温下分解氯酸钾,加催化剂的反应速率快,说明催化剂可以改变反应速率 |
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