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A crow (乌鸦) is thirsty. He finds a little water in a bottle (瓶子). But the neck (颈部) of the bottle is long. The crow can't get water. The crow thinks (想) and thinks. He puts some little stones in the bottle. The water rises up (上升). Now he can drink the water. What a clever crow!
1．The crow is thirsty and hungry. （2．The neck of the bottle is long. （
3．The crow puts some big stones in the bottle. （
4．The crow can't drink the water at last (最后). （
5．The crow is so clever. （
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
