(1)酸奶是由新鲜全脂牛奶经乳酸发酵制得,此过程属于 (填”物理“或“化学”)变化;
(2)酸奶显酸性,则酸奶的pH (填“>”、“<”或“=”)7;
(3)过量饮用酸奶易导致胃酸过多,可服用含氢氧化铝的药物治疗,发生反应的化学方程式是 ,基本反应型是 。
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