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Hello! I’m Xiaojun. I’m from China. I’m twenty years old. Last summer holiday I was in Beijing with my friends, Peter and Jack. Peter is from the UK and Jack is from the US. We visited many famous places(著名景点). We climbed(爬) the Great Wall. Peter and Jack like the Great Wall very much. We ate(吃) Beijing Roast Duck(烤鸭). It’s so nice.
1．Xiaojun is from China.2．Xiaojun is 12 years old.
3．Peter is from the US.
4．They climbed the Great Wall.
5．Jack likes the Great Wall.
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
