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An old tortoise lives by a small pond (池塘). It is nice and quiet.
One day, a little bird comes. She likes the pond too, and she comes every day. She always has a bath in the pond and sings some songs. The old tortoise says, “Are you singing or crying? It’s too loud. I don’t like it.” “I’m sorry,” the little bird says and flies away.
The pond is quiet again. “It’s my pond now,” the old tortoise thinks. He drinks some water, and then has a nap. He is happy. But a week later, he is unhappy again. “It’s too quiet,” he says.
1．Where does the old tortoise live?2．How is the pond?
3．What does the little bird always do in the pond?
4．Does the tortoise like the bird’s songs?
5．Is the old tortoise happy in the end?
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
