NO.PZ2018101901000045
问题如下：
Which of the following statements regarding technical support and resistance is correct?
选项：
A.A breached support level becomes a new level of resistance.
Support is a price range where selling activity is sufficient to stop a rise in price.
C.Resistance is a price range where buying activity is sufficient to stop a decline in price.
解释：
A is correct.
According to the change in polarity principle, once a support level is breached, it becomes a level of resistance. Likewise, when a resistance level is breached, it becomes a level of support.
被突破的支撑位一定会变成阻力位吗？（难道不会一泻千里什么的？
