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1．We had a picnic in the park last Sunday. There was a big lake in the park and there were lots of flowers there.
2．In this photo, The sun is shining. Dongdong is at the zoo. He is taking a photo with the tiger.
3．Xiao Lei is in the library. He’s reading, but two boys talk loudly.
4．He is kind and clever. He’s great. He is called “Father of hybrid rice (杂交水稻)”. He is a model for us!
5．Lucy is behind a tree. She’s playing hide-and-seek with her friend.
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
