搜索
Johnson has a parrot(鹦鹉). It’s a beautiful bird. Every day Johnson says to it, “Hello! I can see you!” Soon the bird can say, “Hello! I can see you!” too.
One day Johnson is at school. A thief(贼) comes into Johnson’s room. He wants to steal(偷) something. A voice(声音) comes, “Hello! I can see you!” The thief puts the things on the floor and runs away.
1．Johnson’s bird is a parrot.2．Johnson often says “Hello! I can see you!” to the bird.
3．Johnson is a policeman.
4．When the thief hears the voice, he puts the things down.
5．The thief steals the bird.
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
