桩侧负摩阻力
参考答案：
当桩周土层相对于桩侧向下位移时，桩侧摩阻力方向向下，称为负摩阻力。
恒牙中发育最早的牙是
A．第一双尖牙
B．侧切牙
C．中切牙
D．第一磨牙
E．尖牙
Theses are his cousin’s first two __________paintings, which he likes very much.
A．little red French interesting oil
B．interesting little red French oil
C．interesting French little red oil
D．little red interesting oil French
