【单选题】(2011年全国统考)有两个并发执行的进程P1和P2,共享初值为1的变量x。P1对x加1,P2对x减一。加1和减1操作的指令序列分别如下所示,两个操作完成后,x的值() 加一操作 减一操作 Load R1,x load R2,x inc R1 dec R2 store x,R1 store x,R2
【简答题】Buckingham Palace is in London, England. Buckingham Palace is famous because Queen Elizabeth(伊丽莎白女王)of England lives there. She became queen in 1952. Buckingham Palace is a big and beautiful building....