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take lot brush times well matter give thank check-up toothache
Doctor: What’s the1．with you, Mary? You don’t look 2．.
Mary: I have a 3．.
Doctor: Let me 4． your a 5．first. Open your mouth,…Oh, you have a bad tooth. Do you eat a 6． of sweet?
Mary: Yes, I do. I like sweet food best. I often eat candy and chocolate.
Doctor: How often do you 7． your teeth?
Mary: Once a day.
Doctor: Oh dear! You should brush your teeth twice a day. And 8． this medicine three 9． a day.
Mary: OK, 10．you, Doctor.
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
