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Mum: Sam, what are you doing?
Sam: I'm looking at the time.
Mum: 1．
Sam: It's 7 o'clock.
Mum: Right. It's 7 o'clock in Beijing. 2．
Sam: Mum, what's the time in London?
Mum: 3．
Sam: Is it lunch time?
Mum: 4． Lunch time in London is at 12:30 pm.
Sam: I'm hungry, mum. I want to have dinner!
| A．It's 11 o'clock. |
| B．What's the time? |
| C．No, it isn't. |
| D．It's dinner time. |
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
