非正式组织
参考答案：非正式组织是两个或两个以上个人的无意识地体系化、类型化了的多种心理因素的系统。
(2014·温州第一次适应性测试)The footballer didn’t succeed in scoring，though________several chances by his teammates.
A．was given
B．being given
C．giving
D．given
试述外科手术预防用药的给药方法。
