(1)下列
A.塑料 B.羊毛纤维 C.涤纶 D.合成橡胶
(2)工业上常以钛铁矿(主要成分:钛酸亚铁FeTiO3)为原料先制取四氯化钛:2FeTiO3+6C+7Cl22FeCl3+2TiCl4+6CO。再在高温下,让四氯化钛与镁发生置换反应生成单质Ti,该反应的化学方程式为
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