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Xiaoyong's grandfather was a policeman before. His grandmother was doctor. His father was an English teacher before. Now he is a policeman. His mother was a worker before. Now she is a nurse. Fanfan's grandfather was a teacher. Her grandmother was a writer. Her father was a fireman before. Now he is a bus driver. Her mother was a farmer. Now she is a flute player. She played Chinese music.
（ ）1. Fanfan's mother worked on a farm. Now she is a flute player.（ ）2. Fanfan's mother played Chinese music.
（ ）3. Fanfan's grandfather was a writer.
（ ）4. Xiaoyong's mother is a nurse.
（ ）5. Xiaoyong's father taught English before.
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
