判断正误True or false: 当飞机俯仰超过+30或-20度，或向左或向右坡度超过65度，PFD会清屏，清除所有不重要的信息。When the pitch angle exceeds +30 or −20 degrees, or roll exceeds 65 degrees left or right，declutter is used to clear all nonessential information from PFD