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| A. When's the Mid-autumn Festival? B. It's usually in June. C. It's usually in January or February. D. It's usually in December. E. When's the Double Ninth Festival? |
Mice: There are many festivals in a year.
Mice: Yes. When's the Spring Festival?
Mice: 1.
Peter: When's the Dragon Boat Festival?
Alice: 2.
Peter: 3.
Mice: It is usually in September or October.
Peter: 4.
Mice: It usually comes in October, after twenty-five days of the Mid-autumn Festival.
Peter: Oh, I see.
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
