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It’s Sunday today. It’s warm. The sky is blue! What a lovely day! So my classmates and I have a picnic. We are having a good time! Look! Wu Liand Liu Ping are catching butterflies. The butterflies are very beautiful. Wang Tao and Liu Hua are playing chess. Huang Jie is watching insects. Wu Lei is collecting leaves. Oh, where is Wang Ying? She is in the woods. She is picking up leaves. She likes collecting leaves, too. What am I doing? Haha! I am taking pictures for my classmates. The pictures are very beautiful. We are very happy! I like having a picnic.
1．It’s very cold today.2．Wang Ying is in the classroom.
3．Wang Tao and Liu Hua are playing chess.
4．Wu Lei is counting insects.
5．Wu Lei and Wang Ying like collecting leaves.
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
