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A: Welcome to our school.
B:
A: Yes, it is. We run and play on it.
B: Where is your classroom?
A:
A: Look, this is our classroom. It’s next to the teachers’ office.
B:
A: Forty-five.
B: A big class!
A: Do you have a library?
B:
| A．Is that the playground? |
| B．It’s on the second floor. |
| C．How many students are there in your class? |
| D．Yes, we do. |
| E．Wow! Your school is big and nice. |
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
