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Hello, I’m Yuanyuan. Yesterday was Saturday. I didn’t go to school. I was at home. I helped Mum and washed my T-shirt. Now the T-shirt is clean. My brother Xiaoyong wasn’t at home. He was out with my father for his Chinese lesson. In the evening, we watched TV together. We had a very happy day.
1．Yuanyuan was at school on Sunday. （______）2．Yuanyuan washed her T-shirt yesterday. （______）
3．Yuanyuan’s T-shirt was clean. （______）
4．Xiaoyong was out yesterday. （______）
5．They did the homework in the evening. （______）
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
