第24题: [单项选择]Second-hand goods sometimes fill you with sadness because ______. A. they are too expensive for ordinary buyers B. they are now not cared for very much C. they make you think of the former owners D. they are sold cheaply 参考答案:C 答案解析:本题为综合理解题。文章第二段第三句讲到“As you look around these shops and see the polished(擦亮的)…you can't help thinking
第25题: [单项选择]在多道程序系统中,每组进程中的每一个进程均无限期地等待被该组进程中的另一个进程所占有且永远不会释放的资源,这种现象称为 A. 独占 B. 等待 C. 睡眠 D. 死锁 参考答案:D 答案解析:[解析] 本题主要考查了什么是死锁状态。 [解题要点] 在多道程序系统中,每组进程中的每一个进程均无限期地等待被该组进程中的另一个进程所占有且永远不会释放的资源,这种现象称为系统处于死锁状态。<