题干

如图,某会展中心在会展期间准备将高5m,长13m,宽2m的楼梯上铺地毯,已知地毯每平方米18元,请你帮助计算一下,铺完这个楼道至少需要多少元钱?

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解:由勾股定理,AC= AB2BC2 =

同类题1

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    The pickle (泡菜) jar as far back as I can remember sat on the floor beside the dresser (梳妆台) in my parents' bedroom. When he got ready for bed, Dad would empty his pockets and toss (投掷) his coins into the jar. It seemed that he was accustomed____doing such a thing When the jar was filled, I used to ____(go) with him and he would take the coins to the bank. “These are for my son's college fund. He'll never work at the mill (磨坊) all his life like me. If he ____ (work) like me in the future, he might not have a bright future. Good education can make a difference to people.” He had the coins ____ (count) and then he deposited the money in the bank.

    The years passed, and I finished college and took a job. Sometimes the job makes me tired ____(mental) but it is my particular preference. If possible, I will do it permanently in my life. Once, while ____ (visit) my parents, I noticed that the pickle jar in my parents' bedroom was gone. My father thought ____ very important for me to receive a good high education. He demanded that I ____ (try) my best to enter a good university.

    The first Christmas after our daughter Jessica was born, we made an ____(appoint) to visit my parents so we spent the holiday with them. Now our big family consists of five people. When Susan came back into the living room, she said softly, “Look”. To my amazement, there stood the old pickle jar, the bottom already____ (cover) with coins. I walked over to the pickle jar, dug down into my pocket, and pulled out a fistful of coins.

    With the strong emotion choking me, I dropped the coins into the jar. I looked up and saw Dad who was carrying Jessica. Our eyes locked, and I knew he was feeling the same emotions as I felt.

同类题5

       My now 7-year-old grandson, who lives 100 miles away, has kept my phone number in his mind since he was 4. Since then, he has been  1 me every night before he goes to bed to tell me about his day or just to say “Good night, Grandma.”
    He also often calls me at other times during the day just to  2  a happy or sad moment. Many times he's playing a basketball with one hand, or laughing with a friend about something that I  3quite understand, or crying about something he may or may not want to talk about while I'm on the other end of the phone. I just listen and empathize (同情) or laugh with him—just share his current (当前的)  4 . I always let him control the  5  , and the time he's on the phone with me. Many times I just listen to him play, or play games we've made up together that we can play over the  6 .   
      The only time I take control of the 7  is when he's ready to say goodbye at night. Often there are four special   8  I say to him every night. One night I thought maybe he was tired to hear those, so I didn't say them. He  9 called me back and told me that I forgot to say those sentences! I haven’t missed saying them since then!
      My friends all know that he is the most important for me.  10  I'm in church(教堂), or some place where I really can't take his call, I always politely excuse myself and talk to him, even if it's just for a minute to tell him I'll call him back in a few minutes.
He knows that he takes first place in my heart.