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Lucy: Helen, the sun is shining. Let’s go shopping.
Helen: Great! What do you want to buy?
Lucy: Some new clothes. Let’s go to the clothes shop.
Helen: Look! The blue dress with a pocket is very nice. I think it looks great on you.
Lucy: I like it. But I want that yellow one. It’s 50 yuan. It’s cheap and pretty.
Helen: Yes, please try it on.
Lucy: OK. Would you like to try on that blue dress?
Helen: That’s a good idea.
1．Where are Lucy and Helen?
2．Does Lucy want to buy the blue dress?
3．What does Helen want to buy?
4．How much is the yellow dress?
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
