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useful can’t blind show hear
1. A: What’s wrong with the old man?
B: He is ______. He can’t see. His dog always helps him.
2. I’m very ______ at home. I can help Mum do the housework.
3. A: There is a ______ about pandas on TV every day.
B: Yes. I like it a lot.
4. A: What’s the matter with Sam?
B: He hurt his feet yesterday. So he ______ walk fast.
5. My grandma is old, but she is not deaf. She can ______.
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
