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B:
C: It’s near the teacher’s office (办公室). Let’s go and see.
B: Wow! It’s so big! But it’s so dirty (脏的).
A:
B&C: OK.
A: Let me clean the teacher’s desk.
B:
C:
A: Now, it’s so nice and clean. I like this classroom.
B&C:
| A．Let me clean the desks and chairs. |
| B．Let’s clean this classroom. |
| C．Me too. |
| D．Really? Where is it? |
| E．Let me clean the door. What about you, Zhang Peng. |
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
