(______)1. Good morning, Liu Tao.
(______)2. Hi, I’m Su Hai.
(______)3. Goodbye, Miss Li.
(______)4. Are you John?
(______)5. Good afternoon, Wang Bing.
(______)6. Hello, Mike.
(______)7. Hello, I’m Mike.
a. Hi, I’m Mike.
b. Good afternoon, Yang Ling.
c. Good morning, Helen.
d. Goodbye, class.
e. No, I’m Sam.
f. Hello, I’m Bobby.
g. Hello, Sam.
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