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Mr. Black had two cats. One was very big and the other was quite small. He liked them very much. One day, Mr. Green, a friend of his, came to see him. To his great surprise, he saw two holes in the door, a large hole and a small hole. He said, “My dear friend, why are there two holes in your door?” “Let the cats in and out.” Mr. Black answered.
“But why are there two holes? Isn’t one hole enough?” asked his friend.
“How can the big cat go through the small hole?” He said.
1．How many cats does Mr. Black have? ( )| A．Three. | B．One. | C．Two. |
| A．Cat. | B．Mr. Green. | C．Nobody. |
| A．Two. | B．One. | C．Three. |
| A．He can look out of the door. | B．Let the cats in and out. | C．It looks beautiful. |
| A．Yes, I do. | B．Yes, it is. | C．No, I don’t. |
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
