public class ExceptionTest { class TestException extends Exception {} public void runTest () throws TestException {} public void test () /* Point X*/ { runTest (); } } At point X on line 4, which code can be added to make the code compile?() [" Throws Exception."," Catch (Exception e)."," Throws RuntimeException."," Catch (TestException e)."," No code is necessary."]
驱动新闻传播行为的终极动力是()。 ["事实真相","受众新闻需求","新闻媒体","记者编辑"]
样本均数抽样误差
众筹、众包有很多商业模式,但重要的是回报模式。
当边际效用为正数时,总效用是增加的;当边际效用为零时,总效用();当边际效用为负数时,总效用()。
亚稳平衡状态