单项选择题
A. The MyCircle class is full encapsulated.
B. The diameter of a given MyCircle is guaranteed to be twice its radius.
C. Lines 6 and 7 should be in a synchronized block to ensure encapsulation.
D. The radius of a MyCircle object can be set without affecting its diameter.
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？（）
单项选择题 WhichstatementistrueifthedoStartTagmethodreturnsEVAL_BODY_BUFFERED？（）
单项选择题 What is the result？（）
