John: What did you buy?
Susan: I bought some drinks and fruit.
John: How many bananas did you buy?
Susan: I bought six bananas.
John: How many pears did you buy?
Susan: I didn't buy any pears. I bought four apples and two watermelons.
John: Did you buy any milk?
Susan: Yes, I bought three bottles.
John: How much orange juice did you buy?
Susan: I bought two bottles.
John: Did you buy some cheese?
Susan: Yes, I bought one kilo.
orange juice | milk | ||
bananas | apples | ||
cheese | watermelons |
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