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Hi, I’m Jack. I’m ten years old. I am thin but strong. I often help my mum and dad to do housework at home. Mother’s Day is in May. And Father’s Day is in June. On these days, I helped them to clean our room, water the flowers, and cook noodles. I made cards for them, too. I think I’m a good boy.
1．Jack is ten years old. He is tall and strong.2．He often does housework at home.
3．He drew pictures for his parents on Mother’s Day and Father’s Day.
4．He cooked noodles for mum and dad.
5．Jack is a good boy.
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
