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牛奶 (Milk)...................... $1.00
可乐 (Cola) ....................... $1.50
红茶 (Black tea ) .............. $1.50
汉堡 (Hamburger) ............ $3.50
面条 (Noodles) ................ $2.30
蔬菜 (Vegetables) ............. $3.00
牛肉 (Beef)........................ $5.00
热狗 (Hot dog)....................$2.00
Amy: I want some noodles and vegetables. And I want some milk.
John: I want a hamburger, a hot dog and a cola.
1．Amy:
2．John:
3．Who is healthier (更健康的)?
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
