Yesterday, I had an English class. In the class, I couldn't see clearly. I could not talk or laugh. I could speak Chinese, but I could not speak English well. I was afraid at first because my English was not very
good. An English teacher came and she helped me. At last, I could speak English well. After class, I could walk and run. I was very happy.
( )1. I had an English class yesterday.
( )2. In my class, I couldn't laugh.
( )3. I was very happy because my English was very good
( )4. No teacher helped me.
( )5. At last, I could speak English well. And I was very happy.
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