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Delia Henderson had always had a dream. She dreamed of taking part in the “Dance World Cup”. It was a famous dance talent show which attracted the best dancers around the world. She was promised by her father that someday she would be taken for an audition (试演) .
The night of her 14th birthday, her city was hit by an earthquake, which, unfortunately, hurt one of her legs terribly. She survived, but the doctor told her that she had to learn to walk with a wooden leg for the rest of her life.
Two years later, Delia saw a notice one day, saying that auditions of the “Dance World Cup” would be held in her city. Painful memories flashed through her mind. It hurt her that she couldn’t live her dream because of her injured leg. However, her mother said, “You learned to walk with your injured leg, so why not learn to dance with it?”
Delia knew it was true but walking was hard, and dancing would be harder. On top of that, she didn’t want to be seen as a joke on the stage. So she told her mother and herself that it was time to say goodbye to her dream.
Her father, however, never forgot his promise to Delia. He signed her up for the show and since he wasn’t sure whether his daughter could get an audition, he did not say a single word to her about the whole thing. Until one day, he got the reply. It was a “Yes”. Excitedly, he took the news to Delia, but she was determined not to go.
Aware of Delia’s worry, her father slowly walked up to her.
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Delia was shaking with nervousness as she made her way to the stage.
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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
