Passage Three At last, unemployment is easing. But thelatest low rate-hovering below 6 percent obscures a deeper, longer-termproblem: "skills mismatches" in the labor force, which will onlyworsen in years to come. Accordi
某工程项目，就外墙粉刷情况分10批进行缺陷状况检验，结果如题35表所示，试计算样本平均缺陷率、中心线和控制界限。题35表
