题目

Survival in the AndesOn October 13, 1972, a small plane flying to Chile accidentally crashed into a mountain in the Andes. How some of the passengers __ to live is one of the greatest survival stories ever told.The survivors ___ inside the remains(残骸)of the plane, using seat covers for blankets, and waited for a ___ that never came. Days turned into weeks. It was urgent to find a way to __ . Three of the passengers— Canessa, Parrado, and Vizintin—volunteered to ____ through the mountains to search for help. When they left, each man wore similar clothes: three pairs of socks, a plastic （2013·天津和平二模，1题）如图所示，—细束光经玻璃三棱镜折射后分解为互相分离的a、b、c三束单色光。比较a、b、c三束光，可知A．若它们都能使某种金属产生光电效应，c光照射出光电子的最大初动能最大B．当它们在真空中传播时，a光的速度最大C．分别用这三种光做光源，使用同样的装置进行双缝干涉实验，a光的干涉条纹中相邻亮纹的间距最小D．若它们都从玻璃射向空气，c光发生全反射的临界角最大