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仔细阅读广告内容，选择最佳答案。
1．___________are not in the sale.
| A．Fridges | B．TV sets | C．Smart phones | D．Cameras |
| A．one week | B．two weeks | C．three weeks | D．four weeks |
| A．everything | B．TV sets | C．smart phones | D．cameras |
| A．25% | B．30% | C．50% | D．80% |
| A．¥1000 | B．¥1200 | C．¥2000 | D．¥3000 |
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
