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Amy: I have two English books, twelve erasers, sixteen crayons and twentytwo pens.
John: I have seven story books, twentythree pencils and nineteen erasers.
Mike: I have nine Chinese books, twentyfive rulers and ten pens.
Mary：I have twentyseven pencils and thirty pens.
| 名称 | 数量 | 名称 | 数量 |
| English book | 1. | pen | 2. |
| Chinese book | 3. | pencil | 4. |
| story book | 5. | ruler | 6. |
| eraser | 7. | crayon | 8. |
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
