题目

阅读理解 A famous teacher was speaking to the students at our school. He began his lesson by holding up a ￡100 bill. Then he said to the three hundred students, Who would like to have this ￡100 bill? The students began to put up their hands at once. Then he said, I am going to give this bill to one of you, but first, let me do this. He then made this bill into a ball. Then he said, Who wants it? Hands went into the air. Well, he said, What if I do this? and he dropped it on the floor and stepped on it. He picked up the dirty, crumpled bill and said, Who still wants it? Hands went back 生活中经常对一些物理量进行估测，下列数值最接近实际情况的是A.人骑自行车的平均速度约为1m/sB.一元硬币的直径约为2.5cmC.冰箱冷冻室的温度约为20℃D.中学生脉搏跳动一次的时间约为3s