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Lin Di is twelve years old. He comes to school early every day. He never eats in class. He asks and answers questions actively. He likes music. He has two music lessons in a week. But he doesn’t like to do housework at home. He reads in bed and goes to bed very late. So his mother writes some home rules for him.
Today Lin Di can’t go to school. Because he has a bad cold. His mother will take him to the doctor.
1．Lin Di is a good boy at home.2．Lin Di goes to bed early every day.
3．There are some rules at Lin Di’s home.
4．Lin Di will go to the hospital today.
5．Lin Di has three music lessons in a week.
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
