多项选择题
Given a web application in which the request parameter product ID contains a product identifier.Which two EL expressions evaluate the value of the product ID？（）
A. ${product ID}
B. ${param.productID}
C. ${params.productID}
D. ${params.productID[1]}
E. ${paramvalues.productID}
F. ${paramValues.productID[0]}
G. ${pageContext.request.productID}
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