(_____) 1. A. Yes, it is. B. It’s a key. C. Blue.
(_____) 2. A. Yes, I am. B. It’s my pencil. C. No, it isn’t.
(_____) 3. A. It’s brown. B. A toy and two keys. C. Here it is.
(_____) 4. A. It’s an egg. B. It’s black and white. C. I have a ruler.
(_____) 5. A. It’s in the desk. B. It’s red. C. It’s a storybook.
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