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Lingling: They are my parents.
Daming: Oh, they were very young.
Lingling: They were on a farm.
Daming:
Lingling: They planted vegetables in the field.
Daming:
Lingling: No, they didn’t. There weren’t any televisions.
Daming:
Lingling: Now they have a computer and a television. They often watch TV.
| A．Where were they then? |
| B．How about now? |
| C．Who are they? |
| D．What did they do there? |
| E．Did they watch TV in the evening? |
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
