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I’m Helen. I’m an English girl. I’m a student. I’m in Class 1, Grade 1. I get up at six o’clock. I go to school at seven o’clock. We have three classes in the morning and two in the afternoon. We go home at four thirty. My father is a policeman. My mother is a driver. I love my father and mother.
1．Helen is a student.2．Helen’s mother is a doctor.
3．Helen goes to school at 6:00.
4．She goes home at four thirty.
5．She has four classes in the morning and two in the afternoon.
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
