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Jack is a new student. He is twelve years old. He is from the UK. He can speak English very well, and he can speak a little Chinese. He is in Beijing. His parents are doctors. Jack is studying in a school near his home. He has classes from Monday to Friday. On Saturdays and Sundays, he often plays games with his Chinese friends. He loves China and his Chinese friends.
1．Jack is from America.2．Jack's father is not a doctor.
3．Jack's school is not far from his home.
4．There aren't any lessons on Saturdays and Sundays.
5．Jack loves China and his Chinese friends.
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
