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多项选择题 Given: 11.<% 12.request.setAttribute("vals", new String[]{"1","2","3","4"}); 13.request.setAttribute("index", "2"); 14.%> 15.<%-- insert code here --%> 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]]}

  • B,D,F
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