断层运动方向判别标志主要有（）、（）、（）、（）。
参考答案：两盘新老关系，牵引构造，擦痕和阶步，断层岩与片理带
Fair and（1）competition in government procurement around the world is good business and good public policy. Competitive pricing, product （2）and performance improvements result from competitive practices and help ensure that government authorities get the best （3）for the public they serve.
A. help
B. server
C. value
D. policy
正确哺乳姿势有哪四个要点？
