题目

Once there was a parrot on sale in a pet shop. It was a beautiful red and blue bird. It sat on a perch in the middle of the shop, so that everyone could see it when they came in. The owner was very proud of it and asked a high price for it. One day a man went into the shop. That's a beautiful bird, he said to the pet shop owner. But why is it so expensive? Is it an unusual birdNo, it's not very unusual. It's expensive because it can talk, the pet shop owner said.I see. How can I make it talk? the man asked.The pet shop owner asked him, Do you see those strings tied to both of the bird's legs?两个物体之间发生热传递，当热传递停止时A.两个物体内能相等B.两个物体温度相等C.两个物体热量相等D.以上说法都不正确