问题
选择题
小芳把一个面积4平方厘米的正方形按2：1的比放大，放大后的正方形的面积是多少平方厘米？（ ）
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答案
因为正方形的面积是4平方厘米，
所以边长是2厘米，又因放大后的正方形边长与原来的比是：2：1；
所以现在正方形的边长是：2×2=4（厘米），
因此正方形的面积是：4×4=16（平方厘米）；
答：放大后的正方形的面积是16平方厘米．
故选：c．
搜题请搜索小程序“爱下问搜题”
小芳把一个面积4平方厘米的正方形按2：1的比放大，放大后的正方形的面积是多少平方厘米？（ ）
|
因为正方形的面积是4平方厘米，
所以边长是2厘米，又因放大后的正方形边长与原来的比是：2：1；
所以现在正方形的边长是：2×2=4（厘米），
因此正方形的面积是：4×4=16（平方厘米）；
答：放大后的正方形的面积是16平方厘米．
故选：c．
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| I ran into a stranger as he passed by. "Oh, excuse me please" was my _1 . He said: "Please excuse me too; I wasn't watching for you." We were very 2 , this stranger and I. We went on our way and we said goodbye. But at home a 3 story is told. Later that day, when I was cooking the evening meal, my daughter stood beside me very 4 . When I 5 , I nearly knocked her down. "Move out of the 6 ," I said with a frown. She walked away, her little heart broken. I didn't 7 how harshly (严厉地) I'd spoken. While I lay awake in bed that evening, my husband said to me, "While 8 a stranger, you are polite, but with the girl you love, you are 9 . Go look on the kitchen floor; you'll find some flowers by the door. Those are the flowers she brought for 10 . She picked them herself: pink, yellow and blue. She stood quietly not to 11 the surprise, and you 12 saw the tears in her eyes." _13 , my tears began to fall. I quietly went and knelt down by her bed. "Wake up, little girl," I said. "Are these flowers you picked for me?" She smiled: "I found them out by the tree. I picked them 14 they're pretty like you. I knew you'd like them, especially the blue." I said: "Daughter, I'm sorry for the way I 15 today. I 16 have yelled at you that way." She said: "Oh Mom, that's okay. I love you anyway." I said: "Daughter, I love you too. And I do like the flowers, especially the blue." I had got the world 17 again. I'd 18 to be polite to people in the street - good 19 make society work. But a stranger is someone we bump into once and then never see again - and 20 is for life. | ||||
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