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Rebecca: Hi, what are you looking at? What animal is it?
Martina: Sh...Look! Can you see it?
Rebecca: Umm...No, where is it? What animal is it?
Martina: It's there. The black and white thing up in the tree.
Rebecca: Ah, yes. It is a ________. It's so cute.
Martina: Yes, it is. It's my favorite animal in the zoo. Rebecca: Do you know where they come from?
Martina: Yes, I do. They come from China. And I also know that they like bamboos. They can climb trees and they can swim.
Rebecca: Wow, you surely know a lot about them.
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
