假定有以下循环结构Do Until 条件表达式 循环体Loop则以下正确的描述是
A．如果“条件表达式”的值是0，则一次循环体也不执行
B．如果“条件表达式”的值不为0，则至少执行一次循环体
C．不论“条件表达式”的值是否为“真”，至少要执行一次循环体
D．如果“条件表达式”的值恒为0，则无限次执行循环体
参考答案：D
解析：Do until… Loop(直到型循环)语句的功能：当条件不成立(为假)时，执行循环，直到条件成立(为真)时，停止循环。
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