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A: Tina, you don’t look happy.
B: I failed the math exam. It’s so difficult for me to learn math well. What should I do?
A: Don’t worry.
B: That’s very nice of you! But I have another problem.
A: Why?
B: I often stay up late at night playing computer games.
A: Oh, that’s bad for your health.
B: Alright, I’ll have a try tonight.
A: You’re welcome.
| A．What’s the matter with you? |
| B．You’d better eat more vegetables. |
| C．I always feel tired in class. |
| D．Why don’t you ask your math teacher for help? |
| E．You should stop staying up and playing games on weekends. |
| F．Thanks for your help. |
| G．Maybe I can help you. |
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
