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Huahua: I have fifty books.
Diandian: How many bags?
Huahua: Four.
Diandian: How about you, Longlong?
Longlong: I have thirty books and two bags.
Diandian: How many pens do you have, Tiantian?
Tiantian: I have twenty pens. And I have twenty-seven pencils.
Names(名字) | Things(物品) | Numbers(数量) |
Huahua | books | 50 |
4 | ||
Longlong | ||
bags | 2 | |
20 | ||
pencils | 27 |
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
