搜索
Du Xiaomao: Hello, Lu Hua.
Lu Hua: Hello, Du Xiaomao.
Du Xiaomao: Nice to see you again. How are you?
Lu Hua:
Du Xiaomao:
Lu Hua: What do you like?
Du Xiaomao: I like
Lu Hua: How many new story books do you have?
Du Xiaomao:
Lu Hua: Cool!
| A．Fine, thank you. |
| B．Maths books and story books. |
| C．Nice to see you again. |
| D．stories |
| E．I have three new story books. |
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
