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Jiamin’s mum: Good morning, Dr. Zhou.
Dr. Zhou: Jiamin, you don’t look well.
Jiamin: I have a headache.
Dr. Zhou:
Jiamin’s mum: Dr. Zhou, Jiamin played computer games too long and went to bed late.
Jiamin: Must I take this medicine?
Dr. Zhou: Not really.
Jiamin: Thanks, Dr. Zhou.
| A．Early to bed makes you healthy and wise. |
| B．I’m sorry to hear that. |
| C．I couldn’t sleep at night. |
| D．But you need to take a good rest. |
| E．What’s the matter with 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
