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Mr. White has two cats. One is big and the other is small. He likes them very much. One day his friend Mr. Black comes to see him. He is very surprised (惊奇). He sees there are two holes in the door, a big hole and a small one. He says, “My dear friend, why are there two holes in your door?” “ To let my cats in and out (出),” Mr. White answers. “But why are there two holes?” asks his friend.
1．Mr. White has two cats. One is big and the other is small.2．There are two holes in Mr. Black’s door.
3．The holes are for the man.
4．Mr. White doesn’t like the cats.
5．Mr. White isn’t clever.
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
