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What colour are their T-shirts?
Mary, Ben, Eric and Amy put their T-shirts on the bed. The T-shirts are white, blue, red and black. The boys’ T-shirts aren’t red and the girls’ T-shirts aren’t black.
What colour is Mary’s T-shirt? I don’t know. But I know it is not blue. Ben says,“My T-shirt is white. ”Then what colour are their T-shirts?
1．There are many T-shirts on the bed.2．The boys’ T-shirts are red.
3．The girls’ T-shirts are not black.
4．Ben’s T-shirt is white.
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
