【简答题】S1:How long does it take to change the engines from ahead to astern?S2:It takes 20 seconds to change the engines from ahead to astern.Q:What are they talking about?A. The engine particulars. B. The br...
【单选题】以下是买机票程序Ti,假设当前某Aj=10,当两个进程并发买票结束后(即i=1,2),Aj可能出现的值是( ) process Ti ( i = 1, 2 ) var Xi:integer; begin {按旅客定票要求找到Aj}; Xi := Aj; if Xi>=1 then begin Xi:=Xi-1; Aj:=Xi;{输出一张票};end else {输出票已售完}; end;