问题
填空题
一个圆的周长是25.12cm，这个圆的直径是______cm，半径是______cm，面积是______cm2．
答案
25.12÷3.14=8（厘米），
8÷2=4（厘米），
3.14×42，
=3.14×16，
=50.24（平方厘米）．
答：这个圆的直径是8厘米，半径是4厘米，面积是50.24平方厘米．
故答案为：8，4，50.24．
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一个圆的周长是25.12cm，这个圆的直径是______cm，半径是______cm，面积是______cm2．
25.12÷3.14=8（厘米），
8÷2=4（厘米），
3.14×42，
=3.14×16，
=50.24（平方厘米）．
答：这个圆的直径是8厘米，半径是4厘米，面积是50.24平方厘米．
故答案为：8，4，50.24．
An old friend from the US whom I was looking forward to staying with , telephoned from the airport to tell me that he had arrived . I was still at the at that time , but I had got everything ready for his arrival . After letting him know where my house was，I told him that I had left the under the door--mat（门垫）. I was likely to be home rather late , I told him to go into the and help himself to food and drink . Two hours later my friend me from the house . At the moment , he said , he was listening to some of my records after having just had a truly wonderful . He had found a cooker and two eggs and had helped himself to some cold chicken from the ice box . Now , he said , he was drinking a glass of orange juice and he hoped I would him . When I asked him if he had reached the house without difficulty , he answered , “I was not able to find the key , luckily the living-room windows just by the apple tree were left open and you know what I could do .” I listened to all this in .In front of my living-room there was no apple tree at all .
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