A.丝瓜在水面处“折断”了,是光的折射现象形成的 |
B.切腊肉前将刀磨一磨,是通过减小受力面积来减小压强 |
C.炒菜前将锅放在燃气灶上烧一会儿,锅内的水变干了,是水的升华现象 |
D.蒸香芋排骨的过程中闻到阵阵香味,说明分子在不停地做无规则运动 |
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