设一个顺序栈的大小为n(n>0),指针top指向栈顶元素的位置,判别栈是否为空的条件语句是( )
A. if(top==0)
B. if(top=0)
C. if(top>n)
D. if(top! =0)
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When I saw these old photos, I couldn’t help _____ what had happened ten years before.
A. reminding
B. recalling
C. recognizing
D. reserving
计算机的内存储器以及外存储器的容量通常是:
A. 以字节即8位二进制数为单位来表不
B. 以字节即16位二进制为单位来表不
C. 以二进制为单位来表不
D. 以双字即32位二进制数为单位来表示
Whenever a pupil makes a mistake, teachers should show him how to correct it ____ punish him.
A. other than
B. rather than
C. sooner than
D. or rather
实施应用软件程序编写的主要依据是( )
A. 系统说明书
B. 数据说明书
C. 模块说明书
D. 数据流程图