A.随着时间延长,水蚤心率受洗衣粉液抑制的程度逐渐增强 |
B.随着洗衣粉液浓度逐渐增大,水蚤心率受抑制的程度逐渐增强 |
C.不同浓度的洗衣粉液经水蕴草净化后对水蚤心率的抑制作用均减弱 |
D.观察不同实验条件下的水蚤心率要选用同一只水蚤,使结果更准确 |
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