There was once a bat (蝙蝠) that was too lazy to hunt insects (捕捉昆虫). One day, he looked into a house and saw a bird in its cage. The bird had all its food and water and didn’t do a
The bat f
The bat was happy in his cage at first, in a warm and c
Some days later, the bat tried his best to run away from the cage and returned home. He began to hunt for food with other bats. Later, he became stronger and enjoyed his life
So. don’t admire (羡慕) others’ life. Maybe it just s

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

