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Meimei: Oh,
Grandma: Yes, I could. I always saw the moon then.
Meimei: Tell me about your school, please.
Grandma: There was no gym in my school fifty years ago.
Meimei:
Grandma: Ah?
Meimei: It’s easy. Haha... It’s a secret.
| A．There was no Internet in your time. |
| B．could you see the moon at night |
| C．How do you know that? |
| D．There is a big gym in my school. |
| E．There was only one small building in this town. |
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
