科研之友
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<正>A man once bought a brilliantly-coloured parrot. Instead of locking it up in a cage or chaining it to a perch, he allowed it to fly free all over the house.The parrot was delighted at this and flapped from room to room, shrieking and screaming with happiness. At last he settled on the edge of a rich curtain.“Who on earth are you?”said a cross voice from below“.Stop that terrible noise at once.”The parrot saw a cat staring up at him from the carpet.“I’m a parrot. I’ve just arrived and I’m to make as much noise as I can,”he said.
