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Yesterday was September 10th. It was Teachers’ Day. We bought some flowers and presents to our teachers’ office. We thanked them for their hard work. Our teachers were very happy. In the afternoon we held a party in our school hall. Many students and teachers gave wonderful performances at the party. Our teachers sang and danced happily with us. All the teachers and students had a good time.
[[QOrDeR]]Yesterday was National Day. （【小题2】We bought some flowers and presents to our teachers’ office. （
【小题3】Our teachers were not happy. （
【小题4】We held a party in the afternoon. （
【小题5】We all 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
