桩基础抗震验算时，下述说法中不正确的是( )。
A．所有的建筑桩基础均应进行抗震验算
B．单桩竖向抗震承载力特征值可比非抗震设计时提高25%
C．液化土层的桩周摩阻力应进行适当的折减
D．桩数较多的挤土桩的施工可使桩间土挤密，液化可能性降低
参考答案：A,B
解析： 《建筑抗震设计规范》(GB 50011—2010)第4.4.1条、第4.4.2条、第4.4.3条
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| "Welcome, Mary," I said. She raised her head and looked into my eyes. The smile on my face 1 . Dear God, I thought, what 2 has entered the life of this little girl? After settling Mary into her new desk and 3 her, I went to the headmaster. She said, "Sit down and I'll 4 you in. Mary's mother who loved her very much was shot and killed in her 5 one night at their house. Mary, screaming, escaped to a neighbor's. Then the child went into 6 . She hadn't cried or 7 her mother since." I returned only to discover that the children were already avoiding this " 8 " child. "Mary's been hurt badly, but we can do a lot to help her," I explained gently. Bless all children. How loving they can be 9 they understand. In spite of our 10 , we seemed to be getting no closer to Mary and even my faith was wearing 11 . My heart ached so badly, wanting this child to come alive, to be aware of the beau  ty, the wonder, the fun, and even the 12 of living. Spring approaching, children 13 to make flower baskets for room decoration. During the  lunch time, a girl came hurrying to me. "Come to see Mary's basket," she said 14 . "You'll never believe it!" I 15 my breath at its beauty, for it couldn't have been the work from a child that 16 . "Mary," I said. "This is beautiful. How did you ever 17 ?" She looked at me with the shining eyes of any 18 little girl, saying, "My mother loved flowers." Thank you, God, You've 19 us the miracle . I knelt and put my arms around the child. Then the tears came, slowly at first, but soon she was 20 her heart out against my shoulder. The other children had tears in their eyes, too, but theirs-like mine-were tears of joy. | ||||
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