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One day, a crow(乌鸦) was very thirsty. So he wanted to drink some water. He saw a bottle with a little water in it. But the neck(颈部) of the bottle was too long, the crow couldn’t(不能) drink the water. Suddenly(突然) he had a good idea. He flew(飞) away and found some small stones. He put the stones into the bottle, the water rose(升起) up. At last he could drink the water. He was very happy. What a clever crow!
1．The crow was hungry and he wanted to drink some water.2．The crow couldn’t drink the water because the bottle’s neck was very long.
3．He put some small stones into the bottle, so the water rose up.
4．At last he was very happy because he couldn’t drink the water.
5．The crow is very 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
