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A. green B. yellow C. blue D. purple E. red
1．A: Look. It’s yellow. What colour is that?(那是什么颜色?)
B: It’s blue.
A: Now look. What colour is it now?
B: Wow. It’s green!
实验报告
_____________+ blue =_________________
2．A: Look. It’s blue. What colour is that?
B: It’s red.
A: Now look. What colour is it now?
B: Wow. It’s purple!
实验报告
_____________+ _________________=_________________
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
