搜索
My name is Dongdong. I'm nine. I'm a pupil. This is my father. He's a driver. This is my mother. She's my English teacher. This is my grandpa. He's a doctor. This is my grandma. She's a nurse.
| 1. father | □ A. a teacher | □ B. a driver |
| 2. mother | □ A. a teacher | □ B. a doctor |
| 3. grandpa | □ A. a policeman | □ B. a doctor |
| 4. grandma | □ A. a nurse | □ B. a farmer |
| 5. Dongdong | □ A. a teacher | □ B. a pupil |
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
