第17题: [单项选择]存在一个等待事务集T0,T1,…,Tn,其中T0正等待被T1锁住的数据项,T1正等待被T2锁住的数据项,Tn-1正等待被 Tn。锁住的数据项,且Tn。正等待被T0锁住的数据项,则系统的工作状态处于 A. 并发处理 B. 封锁 C. 循环 D. 死锁 参考答案:D 答案解析:[解析] 这种循环等待的现象称为死锁。
A. He was a doctor working in a city. B. He was a doctor working in the country. C. He was an artist working in Dublin. D. He was an artist working outside Dublin. 参考答案:B
第37题: [单项选择]Our society has changed and ______ in it. A. so the people have B. the people have so C. so have the people D. have the people so 参考答案:C 答案解析:本题考查倒装的用法。“so+助动词/情态动词+主语”用在肯定句中,表示前者的情况也同样适用于后者,通常翻译成“…也是”。如:I'm doing my homework;so is he.我在做作业,他