I have a good friend. Her name is Mary. She is from Australia. She has long yellow hair. She is twelve years old. She is a student. Her dad is a teacher. Her mom is a doctor. They work in China now. Mary has a brother. His name is Jack. Jack is a cute boy. He is short but strong. Jack is a student, too. Mary and Jack love their family very much.
1.Mary is from the UK.2.Mary and Jack are students.
3.Her mom is a teacher.
4.Her parents work in China now.
5.There are three people in Mary’s family.
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