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A: Hi, Lingling!
B: I am reading an article about a great woman, Zhang Guimei.
A: Zhang Guimei?
B: A headmaster. She is already 64 years old now.
A: A 64-year-old headmaster? Is she still at work?
B:
A: Only for girls? Sounds interesting!
B: Because many of the girls in Lijiang can’t afford to continue schooling after they finish their junior high school. She helps the girls go back to school.
A: How great she is!
B:
A: Amazing! She is our hero!
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
