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Last summer holiday Su Nan went to Beijing with his parents. They went there by train and stayed there for three days. On the first day. They went to Tian'anmen Square. It was big and great. There were many people. The next day, they visited the museum and ate delicious Beijing Duck and bought some gifts. The last day they went to the Great Wall. They took many photos there. They were very happy.
1．Su Nan went to Beijing with his friends.2．They went to Beijing by bus.
3．The next day, they visited the museum.
4．The last day they went to Tian'anmen Square.
5．They really had a good time.
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
