实验步骤 | 实验现象 | 我的发现 |
1.将一块土壤放入盛有水的杯中 | ( | ( |
2.用玻璃棒搅拌放入土块的水,然后静置一段时间 | ( | ( |
3.把土块放入蒸发皿中用酒精灯加热,加热时盖上一片薄玻璃 | ( | ( |
4.取走玻璃片继续加热 | ( | ( |
我的实验结论
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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