题目

Most Americans are turning to charm school to gain an advantage over competitors in a job market stricken by the longest economic slowdown since the Great Depression. Etiquette (礼节) trainers report business growing from clients who believe that good manners could be the key selling point that helps them get hired or keeps them off the unemployment line. “People are prepared to do whatever it takes to keep their job”, said Gloria Starr, an adviser on image, etiquette and communications in North Carolina. Starr, who says business is up 40 percent in the past year at her school, said peop 发生闪电时，云层间的电压可达到几亿伏，电流可达到几万安，如果其放电通过人体，能够立即致人死亡；如果通过树木、建筑物，________会使它们受到严重的破坏．所以，高大建筑物要使用________装置．