第21题: [单项选择]在采用非抢占式进程调度方式下,下列______不会引起进程切换。 A. 时间片到 B. 一个更高优先级的进程就绪 C. 进程运行完毕 D. 进程执行 P 操作 参考答案:B 答案解析:在 CPU 为不可剥夺(非抢占式)进程调度方式下有以下 4 种情况会引起进程切换。
1、正在执行的进程运行完毕。
2、正在执行的进程调用阻塞原语将自己阻塞起来进入等待状态。
3、正在执行的进程调
第22题: [单项选择]Although many colonial scholars consider Jonathan Edwards an important writer, ______ anymore. A. though few people read his novels B. but few people read his work C. and his works are not widely read D. his works are not widely read 参考答案:D 答案解析:[分析] 前有连词although,后面从句不可再用此类连词。本句意味:虽然许多殖民时期的学者认为乔纳森·爱德华兹是一位重要的作家,但他的作品并没有被广泛阅读。