狼误吞下了一块骨头,十分难受,四处奔走,寻访医生。他遇见了鹭鸶,谈定酬金,请他取出骨头,鹭鸶把自己的头伸进狼的喉咙里,叼出了骨头,便向狼要谈定好的酬金。狼回答说:“喂,朋友,你能从狼嘴里平安无事地收回头来,难道还不满足,怎么还讲报酬?”
寓意:
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