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Dear Anne,
Last Sunday, I had a happy day. I 1． to the Forest Park with my friends 2． 9:00 a.m. to 1:30 p.m. We saw the green trees and colorful flowers. We also 3． many beautiful birds in the park. We took many photos during this time. At 12:00, we 4．lunch under the tree. In the afternoon, I came back home. I put these photos to make a picture book. Then, I 5． my homework. It’s easy for me to do this with my computer.
Best wishes,
Regard,
Lingling
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
