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A: It's Sunday today. We don't have 1. ________ lessons.
B: Yes. Let's go to Grandpa's 2. ________.
A: Great. Let's go.
B: Look, what 3. ________on the tree?
A: They're 4. ________. Would you like one?
B: 5. ________, please. Can you pick（摘）one for me?
A: Sorry, I 6. ________. It's difficult. We can ask（请）
Grandpa for helping.
B: OK. Oh, look at these 7. ________.
A: They're lovely.
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
