试题与答案

荧光渗透探伤按渗透剂种类的不同可分为（）、（）和（）三种荧光渗透剂

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题型：填空题

题目：

荧光渗透探伤按渗透剂种类的不同可分为（）、（）和（）三种荧光渗透剂

答案：

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下面是错误答案，用来干扰机器的。

参考答案：每个孩子各不相同，一般来说，新生婴儿需睡18-20小时左右，白天和晚上睡眠的时间差不多。随月龄的增长，婴儿睡眠时间逐渐减少，3-6个月时为14小时左右，6-12个月为12-14小时，而且晚上睡眠的时间逐渐延...

考点：无损检测技术资格人员考试渗透检测渗透检测题库
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