单项选择题
A collection of products is stored in the Servle Context in an attribute called catalog. Which JSTL code structure iterated over each product in the collection and prints out the names of the products in an un-ordered list？（）
A.A B.B C.C D.D
单项选择题 WhichstatementistrueifthedoStartTagmethodreturnsEVAL_BODY_BUFFERED？（）
单项选择题 What is the result？（）
单项选择题 What is the result（）？
