单项选择题
A.Direction d = NORTH；
B.Nav.Direction d = NORTH；
C.Direction d = Direction.NORTH；
D.Nav.Direction d = Nav.Direction.NORTH；
单项选择题 Given a correctly compiled class whose source code is： Assume that the class file is located in /foo/com/sun/sjcp/， the current directory is /foo/， and that the classpath contains "." （current directory）. Which command line correctly runs Commander？（）
单项选择题 Aclassgames.cards.PokeriscorrectlydefinedinthejarfilePoker.jar.AuserwantstoexecutethemainmethodofPokeronaUNIXsystemusingthecommand：javagames.cards.PokerWhatallowstheusertodothis？（）
单项选择题 What is the result？（）
