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| Wow! It’s so big! What’s in the classroom? I like it. The door is red. How many desks are there? |
Sarah: Hey, Zhang Tao. We have a new classroom.
Zhang Tao: Great! 1.
Sarah: I don’t know. Let’s go and see.
Zhang Tao: 2.
Sarah: Yes, it is.
Zhang Tao: 3.
Sarah: And the window is green.
Zhang Tao: 4.
Sarah: There are 25.
Zhang Tao: 5.
. It’s so nice. Sarah: Me too.
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
