"Small sticks with lengths of 3cm, 8cm, and 3cm can form an isosceles triangle""(1/5):(1/4) and 4:5 can form a ratio""a**3 must be greater than a** 2 "Among these three sentences, how many are correct?
"长度分别为3cm、8cm、3cm的小棒能围成一个等腰三角形""(1/5)：(1/4)与4：5可以组成比例""a**3一定大于a**2"这三句话中，正确的有多少句．
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