单项选择题
What is the result？（）
A. An exception is thrown. B. The code does not compile. C. “Hello worlds.” Is printed to the terminal. D. The program exits without printing anything.
单项选择题 Whichwilldeclare themethodthatforcesasubclasstoimplementit？（）
单项选择题 What is the result？（）
多项选择题 Whichthe twoarereservedwordsinJava？（）
