桩侧摩阻力的深度效应
参考答案：
桩侧摩阻力随着桩的入土深度，特别是持力层的深度而变化，这种特性称为桩侧摩阻力深度效应
—It’s nice. Never before_______ such a special drink!
A．I have had
B．I had
C．have I had
D．had I
接受维生素D治疗的佝偻病患儿应每3个月测1次身高及智力发育。
