对于L/d>20的钻孔嵌岩灌注桩，这类桩应按下列( )类桩型进行设计。
A．摩擦桩
B．摩擦端承桩
C．端承桩
D．端承摩擦桩
参考答案：B
Those are my _____. I love them _____ . [ ]
A. sister; very much
B. brothers ; very
C. cousins ; very much
D. aunts ; much very
压力超过0.25MPa，有哪些原因？如何处理？
