



1. Lisa: Hello, Li Yan. This is my mother.
Li Yan: Nice to meet you.
Lisa’s mother: Nice to meet you, too.
2. Kate: Mum and Dad, this is Mr Zhang. This is my mother and this is my father.
Mr Zhang: Good afternoon.
Kate’s father and mother: Good afternoon.
3. Yang Ming: Dad, this is Peter. Peter, this is my father and this is my mother.
Peter: Good morning.
Yang Ming’s father and mother: Good morning.
4. Gao Wei: Good morning. Miss Liu. This is my father.
Miss Liu: Nice to meet you.
Gao Wei’s father: Nice to meet you, too.

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

