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.
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同类型试题
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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
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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
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