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Lost and Found
| Found: Is this your book? Please call John at 495-3456. | Found: Is that your backpack? Please call Mary at 476-5939. | Lost: My pencil case. Blue and white. Call Tom at 456-8700. |
| Lost: My school ID card. My name is Mike. Please call me at 487-2349. | Found: A set of keys. Please call Lily at 498-2456. | Found: A cat. Black and white. At the school gate. Call Lisa at 412-9856. |
| A．487-2349 | B．498-2456 | C．412-9856 | D．476-5939 |
| A．Mike’s | B．Lisa’s | C．Tom’s | D．John’s |
| A．a blue and white cat | B．a black and white case | C．a black backpack | D．a black and white 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
