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Father: Jim, let me show you some old photos.
Jim: Great, dad!
Father: Oh, he’s your grandpa.
Jim: Wow.
Father: Yes, he was very healthy at that time.
Jim: He was in a blue uniform.
Father: Yes, he was. He worked very hard at that time.
Jim:
Father: Right.
| A．Was he a policeman before? |
| B．Who’s this young man? |
| C．But now he is old and weak(虚弱的). |
| D．Let’s go and tell him. |
| E．Grandpa was strong when he was young. |
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
