题目内容

量变是事物数量的增减和组成要素排列次序的变动，质变是事物性质的变化。

A. 对
B. 错

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钢筋砖过梁两端的砖应伸进墙内的搭接长度不小于（）mm。

A. 60
B. 120
C. 240
D. 360