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Travelling is good for us. It can help us have a good rest when we are tired of our work or study. We can enjoy beautiful scenes (风景). It can help us make many friends. But sometimes we may have bad things during the travelling. Last Sunday, I went to Xishan Park with my friends. It was hot and sunny in the morning. We went fishing in the river. We had a good time. At 12:00, We began to have lunch in the park. Suddenly, it began (开始) to rain. We didn't have umbrellas or raincoats. We were all wet. What bad luck!
1．Travelling is2．Travelling can help us make
3．We went to Xishan Park
4．We
5．We
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
