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I’m going to visit my grandparents today. Because of COVID-19 (新冠), I stayed at home to have a rest last week. I had to wash my hands every day. I couldn’t go to school or play with my friends. I was very sad. But I knew it is good for my health to do these things. I think I should exercise more and stay healthy to fight against virus (抗击病毒).
1．I am going to visit my parents today.2．I am happy to have a rest at home last week.
3．I wash my hands every day.
4．I should exercise more and stay healthy.
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
