新实验中学校园正在进行绿地改造，原有一正方形绿地，现将它每边_爱下问搜题

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问题解答题

新实验中学校园正在进行绿地改造，原有一正方形绿地，现将它每边都增加3米，面积则增加了63平方米，问原绿地的边长为多少？原绿地的面积又为多少？

答案

设原绿地的边长为x米，则新绿地的边长为x+3米，

根据题意得，（x+3）²-x²=63，

由平方差公式得，（x+3+x）（x+3-x）=63，

解得，x=9；

∴原绿地的面积为：9×9=81（平方米）；

答：原绿地的边长为9米，原绿地的面积为81平方米．

填空题

若“!”是一种数学运算符号，并且：1!=1，2!=2×1=2，3!=3×2×1=6，4!=4×3×2×1，…，则

完形填空

Never before had I imagined I should have the opportunity to live with so many girls．Would they 　36　such a single “Hi” from me? I was about to greet my new roommates，　37　they did not seem to have the same 　38　attention that I had．They just dealt with their own 　39　， sorting out their clothes，and making arrangements for their university life．Thus tranquility（宁静）
became the 　40　atmosphere in the dormitory．
To my surprise，　41　such a situation，I did not feel a sense of 　42　．With time going on，we got to know each other deeper．I was　43　to find that in deep soul we all had great dreams and belonged to the same　44　．
However，not long before the 　45 　was disturbed by my own upset of mind for study pressure．What I was　46　about seemed to have 　47　to do with them and what they were doing and talking about seemed so far away from me．However，one incident changed my 　48　and made me treasure this kind of 　49　better and more confident in our friendship．
One day，when I was leaving the teachers’ office，it was in complete silence and frightening 　50　．At my dormitory gate，I was startled （使惊奇）to find there still 　51 　a little light glimmering in the darkness，so faint but yet so clear．Just under the 　52　of the light，I went to the room without any difficulty．They were in sound sleep，leaving the 　53　light on in the calm world．Tears rolled down my cheeks．
I know 　54　that we all like tranquility，both in environment and in our mind．It is the care that 　55　all the misunderstandings and unpleasantness．

B．disappointment

B．disappointed

D．arrangement