搜索
Li Lei: Come on, Wang Ke! Look ! 1．
Wang Ke: They are tigers.
Li Lei: How many tigers can you see?
Wang Ke: 2．
Li Lei: Are the elephants drinking water?
Wang Ke: 3．
Li Lei: Wow! The trunks (象鼻) are so long.
Wang Ke: Look! What are the monkeys doing?
Li Lei: 4．
Wang Ke: Can you climb trees?
Li Lei: 5．. It's not easy(容易).
Wang Ke: Oh! Time to go home. Let's go together.
Li Lei: OK.
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
