多选题Given: 11. 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]]}

多选题
Given: 11. 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]]}


参考解析

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