1. ( )
A. Hi, WuYifan.
B. Hello. What’s your name?
C.OK!
2. ( )
A. Good morning, John.
B. Very well, thanks.
C. I’m John.
3. ( )
A. How are you, Sarah?
B. Good morning.
C. Good afternoon.
4. ( )
A. Thank you.
B. Great!
C. Goodbye!
5. ( )
A. Nice to meet you.
B. Hello, Liu Xin.
C. 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