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Mum: What are you doing, Bob?
Bob: I am making a birthday chart for my family. When is your birthday?
Mum: My birthday is in May.
Bob: My grandmother’s birthday is in May, too. When is Dad’s birthday?
Mum: It’s in June.
Bob: There are three birthdays in June. My birthday is in June. Uncle Victor’s birthday is in June, too. When is Aunt Anna’s birthday?
Mum: Her birthday is in November. Cousin Ann’s is in April.
Bob: Great! Here is the chart.
1．Bob’s
2．Bob’s mother’s birthday is in
3．Bob’s Dad’s birthday is in
4．Bob’s Aunt Anna’s birthday is in
5．Bob’s Cousin Ann’s birthday is in
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
