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Here are three notices（告示）in Hefei No.6 Middle School.
| FOUND I found a purple and green schoolbag in the school library. A watch and an English dictionary are in it. Is it yours? Call Jim at 435-2856. You call his teacher at 435-6286, too. |
| LOST My name is Gina. I lost my pencil bag this morning. It’s blue. Three pens and an eraser are in it. If（如果）you find it, please call me at 265-8851. |
| FOUND I found a set of keys on the playground（操场）this afternoon. Are the keys yours? You can ask Mr. Li for them. You can call him at 766-5633. |
1．What can you see in the schoolbag?
| A．A watch. | B．A pencil bag. | C．A set of keys. | D．An eraser. |
| A．Mr. Li. | B．Jim. | C．Gina. | D．Jim’s teacher. |
| A．435-2856. | B．435-6286. | C．265-8851. | D．766-5633. |
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
