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John: When is my birthday, Mum?
Mum: Your birthday is in May.
John: And when is my father's birthday?
Mum: His birthday is in April.
John: And you, Mum?
Mum: My birthday is in June.
John: Oh, dear! Father is only one month older than（比……大）me, and am one month older than you, Mum!
1．John's birthday is in January. （______）
2．John's father's birthday is in April. （______）
3．John's mother's birthday is in June. （______）
4．John's father is only one month older than John. （______）
5．John is one month older than his mother. （______）
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
