A.向a瓶中加入NaOH溶液的目的是避免外界空气中CO2的干扰 |
B.适当增加橡皮球(或气泵)的通气量,会增加石灰水的浑浊程度 |
C.实验过程中向a瓶通入的空气越多,则b瓶产生的酒精越多 |
D.若c瓶加入的是溴麝香草酚蓝溶液,则溶液最终会变成黄色 |
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