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Jack is a 10-year-old boy. His younger sister, Mary, is 3 years old. On Friday night, Jack and his family go to a restaurant to celebrate his Dad’s birthday. They have a buffet (自助餐). After meal they order some drinks. Jack’s parents want a cup of coffee and a cup of tea. Jack would like a glass of orange juice and a glass of chocolate milk for Mary.
1.Jack and his family go to a restaurant to celebrate his birthday.2.They have dinner on Friday night.
3.They need to pay $ 9 for drinks.
4.They have to pay $ 32 for the meal.
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同类型试题
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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
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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
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