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Xiao Jun:
Grandpa:
Xiao Jun: Oh, it’s time to go to school!
Grandpa:
Xiao Jun: At 8:20 a.m.
Grandpa:
Xiao Jun: I have English, maths, art and PE. I like maths best. I have two maths classes today.
Grandpa: When do you have the maths classes?
Xiao Jun:
| A．It’s 7:30 a.m. now. |
| B．At 11:15 a.m. |
| C．Good morning, Grandpa. |
| D．Good morning, Xiao Jun. |
| E．What do you have today? |
| F．When do you start class? |
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
