某工厂有A、B、C三种不同型号的产品,这三种产品数量之比为2:3:5,现用分层抽样方法从中抽出一个容量为n的样本,该样本中A种型号产品有8件,那么此样本的容量n是( ) A.12 B.16 C.20 D.40 答案:DI have been convinced that the print media are usually
more ____ and more reliable than television.
A.shallow B.ridiculous C.urgent D.accurate