Amy: Yes. Mrs Black.
Later the door is open again (再次).
Mrs Black: Sam, please close the door.
Sam: Yes, Mrs Black.
Now, the window is open.
Mrs Black: Don’t open the door or the window again.
The class: Not us!
Mrs Black and the class look at the window.
Later a white cat comes. It jumps (跳) to the window and opens the window.
Mrs Black: It’s a cat. Let’s make a house (房子) for it!
The class: Yes, Mrs Black.
1.Mrs Black is at home. (_____)
2.Sam closes the door. (_____)
3.The students open the window and door. (_____)
4.The cat is white. (_____)
5.Mrs White and the class make a house for the cat. (_____)
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