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[[QOrDeR]]在早上上学的时候，你碰到了你的同学，你应该说：( )
| A．Good morning ! | B．Good evening! | C．Good afternoon! |
| A．I go to school at 7:30 in the morning. | B．I go home at 7:00 pm. | C．I have breakfast in the morning. |
| A．We have dinner in the evening. |
| B．We have breakfast in the evening. |
| C．We have lunch in the evening. |
| A．Good afternoon teacher. | B．Good morning, teacher. | C．How do you do. |
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
