Given: 11. 12.request.setAttribute("vals", new String[]{"1","2","3","4"}); 13.request.setAttribute("index", "2"); 14.%> 15. Which three EL expressions, inserted at line 15,are valid and evaluate to "3"?()
A. ${vals.2}
B. ${vals["2"]}
C. ${vals.index}
D. ${vals[index]}
E. ${vals}[index]
F. ${vals[vals[index-1]]}
采购与付款业务循环中的退货或折让通知单是反映由于退货或折让而减少向供应商付款金额的凭证,用于反映()
A. 应收账款的减少
B. 应收账款的增加
C. 应付账款的减少
D. 应付账款的增加
商务领航定制网关可对多种即时消息(如QQ、MSN等)以及多种应用(BT、电驴、pp_stream、pp_live等)进行使用的阻隔。()
A. 正确
B. 错误