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Mom: It’s 7:30 p.m.
Sam: I’m doing homework now. What are you doing, Mom?
Mom:
Sam: Where is my sister?
Mom: Shh.
Sam: OK!
Mom: No, he isn’t.
| A．He’s working in the study(书房). |
| B．Is my father cleaning the floor, too? |
| C．Mom, what time is it? |
| D．It’s time to do your homework. |
| E．I’m cleaning the floor. |
| F．Your sister is sleeping in her bed. |
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
