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B: 1．
A: Do you like dogs?
B: Yes. 2． They can do lots of things.
A: Tell me more (更多) about dogs.
B: 3． We call them “guide dogs”(导盲犬).
A: 4．
B: Yes, they can. We call these dogs “listening ear dogs”(导听犬). Dogs can help the firefighters, too.
A: Really?
B: 5． Last week, there was a fire. They helped the firefighters.
| A．Of course. |
| B．Dogs can help the blind people. |
| C．I watched a TV show about dogs. |
| D．Dogs are very useful. |
| E．Can they help the deaf people? |
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
