题目内容

大于 0.7 小于 0.9,计数单位是 0.01 的小数有(  )个.
A.1B.18C.19D.无数
大于0.7,小于0.9的两位小数有:0.71,0.72,0.73,0.74,0.75,0.76,0.77,0.78,0.79,0.80,0.81,0.82,0.83,0.84,0.85,0.86,0.87,0.88,0.89.
这样的小数有19个.
故选:C.
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