我养了螃蟹一只,他眼睛、嘴巴都不怎么显眼,钳子倒是很大。它最爱显的钳了。有一次,我轻轻点了它一下用一根小棍,它立刻转动身体,向我高高举起那大钳子剪刀似的。我点了几下又,它钳子越举越高,突然,整个身子翻了过去。它急了,钳子在空中乱舞,好不容易才借助玻璃缸壁翻过身来。
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