下列四种形式的循环设计中，衙环次数最少的是( )。

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a＝5:b=8
Do
a＝a+1
Loop While a＜b  a＝5:b＝8
Do
a＝a+1
Loop Until a＜b  a＝5:b＝8
Do Until a＜b
b＝b+1
Loop  a＝5:b＝8
Do Until a＞b
a＝a+1
Loop

应力循环次数钢筋强度应力集中的程度最大最小应力的比值

机械循环热水供暖系统低压蒸汽供暖系统重力循环热水供暖系统低压热风供暖系统

a=5:b=8
Do
a=a+1
Loop While a＜b  a=5:b=8
Do
a=a+1
Loop Until a＜b  a=5:b=8
Do Until a＜b
b=b+1
Loop  a=5:b=8
Do Until a＞b
a=a+1
Loop

a=5：b=8 Do a=a+1 Loop While a＜b a=5：b=8 Do a=a+1 Loop Until a＜b a=5：b=8 Do Until a＜b b=b+1 Loop a=5：b=8 Do Until a＞b

a=5:b=8 Do a=a+1 Loop While a＜b a=5:b=8 Do a=a+1 Loop Until a＜b a=5:b=8 Do Until a＜b b=b+1 Loop a=5:b=8 Do Until a＞b a=a+1 Loop

a＝5:b＝8 Do a＝a+1 Loop While a＜b a＝5:b＝8 Do a＝a+1 Loop Until a＜b a＝5:b＝8 Do Until a＜b b＝b+1 Loop a＝5:b＝8 Do Until a＞b a＝a+1 Loop

a=5:b=8 Do a=a+1 Loop While a＜b a=5:b=8 Do a=a+1 Loop Until a＜b a=5:b=8 Do Until a＜b b=b+1 Loop a=5:b=8 Do Until a＞b a=a+1 Loop

a=5:b=8 Do a=a+1 Loop While a＜b a=5:b=8 Do a=a+1 Loop Until a＜b a=5:b=8 Do Until a＜b b=b+1 Loop a=5:b=8 Do Until a＞b a=a+1 Loop

重力循环热水供热系统机械循环热水供热系统低压蒸气供热系统低压热风供热系统

a=5:b=8 Do a=a+1 Loop While a＜b a=5:b=8 Do a=a+1 Loop Until a＜b a=5:b=8 Do Until a＜b b=b+1 Loop a=5:b=8 Do Until a＞b a=a+1 Loop

重力循环热水供热系统机械循环热水供热系统低压蒸气供热系统低压热风供热系统

a=5:b=8 Do a=a+1 Loop Wbile a＜b a=5:b=8 Do a=a+1 Loop Until a＜b a=5:b=8 Do Until a＜b b=b+1 Loop a=5:b=8 Do Until a＞b a=a+1 Loop

DNA聚合酶的种类反应体系中模板DNA的量引物序列的结构和长度四种dNTP的浓度循环周期的次数

a＝5:b=8 Do a＝a+1 Loop While a＜b a＝5:b＝8 Do a＝a+1 Loop Until a＜b a＝5:b＝8 Do Until a＜b b＝b+1 Loop a＝5:b＝8 Do Until a＞b a＝a+1 Loop