题目

Mr Smith made many tests (作试验) with different animals and the monkey was the cleverest of all the animals. One day Mr Smith put a monkey in a room. He also put some small boxes in it. In one of the boxes there was some food. How long will it take the monkey to find the food? Mr Smith said to himself. Let me wait and see. He left the room and waited outside. Three minutes later, he put his eye to the keyhole (钥匙眼). What did he see? He saw the eye of the monkey. The monkey was on the other side of the door and looked at Mr Smith through the keyhole. 1. Mr Smith made te放在水平桌面上的大烧杯内盛满水，轻轻放入一小球后，从烧杯中溢出了200g水，则下列判断中不正确的是（　　）A．水对烧杯底的压强一定不变B．小球受到的浮力一定为2NC．小球的体积一定不小于200cm3D．小球的质量一定等于200g