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Dear Tom,
How are you? I live in Beijing now. It isn't cold here. It was my mother's birthday yesterday. So I painted a picture for her. She was very happy. I helped my mum, too. I cleaned all the rooms. We had a birthday party for her. Yesterday was a special (特殊的) day.
FromDaming
1．Daming lives in Beijing now.（
2．The weather in Beijing isn't cold.（
3．Daming bought his mum some flowers for her birthday.（
4．Daming cleaned all the rooms yesterday.（
5．They didn't have a birthday party yesterday.（
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
