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I am John. I have a good friend. His name is Ben. He is nine years old. We are in Grade Three, but in different classes. I am in Class one. He is in Class Three. Ben is a good student. He is clever and kind. I like him very much. Ben helps me and plays with me. Both of us like football. We often play football in the afternoon.
1．Ben is John’s good friend.2．Ben is 10 years old.
3．John is in Class One, Grade Three.
4．John and Ben often play football in the morning.
5．Ben and John are in the same class.
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
