为了支持压栈线程与弹栈线程之间的交互与同步,在程序的下画线处依次填入的语句是( )。
public class IntStack{
private int idx=0;
private int[]data=new int[8];
public void push(int i){
data[idx]=i;
idx++;
… …
}
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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