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The Frog(青蛙) Prince
Long long ago, there was a little lovely princess(公主). One day, she played with her dear golden(金色的) ball. Suddenly it fell into the water and the princess cried. At that time, an ugly(难看的) frog turned up and told the princess he would help her to pick up the ball if she promised(承诺) him to make friend with him. The princess promised him and the frog dived(跳入) along into the river and picked up the ball. However(然而), the princess didn’t keep her promise and ran away. The frog went to the palace(皇宫) the next day and the king soon understood what had happened. He was not happy because the frog helped her. She should keep her promise. Then the frog had a meal with the princess. He wanted to sleep with the princess. She was very angry and threw(扔) the frog to the wall rudely(粗鲁地). Magically(令人惊奇地), the frog turned into a prince. At last, the princess and the frog prince lived happily together.
1．One day, the princess played with her football.2．The frog was very beautiful.
3．The princess got her ball, then ran away.
4．The frog wanted to make a friend with the princess.
5．This story told us we should keep our promise
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
