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Dear Oliver,
How about your Labour Day? I was busy and happy. I went to my uncle’s farm. I made many new friends there. They are very nice and friendly. We went fishing together. We rode horses and saw other animals at the farm. We climbed mountains and had a picnic, too. We had lots of fun.
Please write to me soon.
Wang Gang
1．Wang Gang was busy and happy on the Labour Day.
2．Wang Gang went to his grandpa’s farm.
3．There were many animals at the farm.
4．They went boating together.
5．Wang Gang had lots of fun with his new friends.
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
