(
A. In the morning. B. In the afternoon. C. In the evening.
(
A. At home. B. In the zoo. C. At school.
(
A. Because they want to see flowers. B. Because it's Sunday.
C. Because their teachers take them to the park.
(
A. For nine and a half hours. B. For three hours. C. For five and a half hours.
(
A. They go to the zoo with their parents. B. They play with pandas in the zoo. C. They go to the zoo by bus.
(
A. Fly kites. B. Watch monkeys. C. Climb hills.
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