A. He is happy. B. He is hungry and thirsty. C. He is angry.
A. A hot dog and a hamburger. B. A hot dog, a hamburger and a cola. C. A hot dog, a hamburger and two colas.
A. It's $ 2.00. B. It's $ 3.75. C. It's $ 1.25.
A. It's $ 2. 00. B. It's $ 3. 75. C. It's $ 1.25.
A. No, it isn't. B. Yes, it is. C. No, it's $ 1.75.
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