某一检测人员在测定混凝土泵送剂的坍落度保留值时，试验步骤如下：
①出盘的混凝土拌合物按GB/T50080进行坍落度试验后得坍落度值Ho；立即将能够做一组坍落度的部分物料装入铁桶或塑料桶内；
②存放30min后将桶内物料倒在拌料板上，不需翻拌，直接进行坍落度试验得出30min坍落度保留值H30；
③再将全部物料装入桶内，密封再存放60min，再测定一次坍落度，得出60min坍落度保留值H60。
问题：1）该检测人员做法是否正确？
2）如果不正确，请指出错误，并写出正确做法。
参考答案：
不正确。
错误一：第①条中立即将能够做一组坍落度的部分物料装入铁桶或塑料桶内。
正确做法：立即将全部物料装入铁桶或塑料桶内，用盖子或塑料布密封。
错误二：第②条中将桶内物料倒在拌料板上，不需翻拌。
正确做法：将桶内物料倒在拌料板上，用铁锨翻拌两次。
错误三：第③条中再将全部物料装入桶内，密封再存放60min。
正确做法：再将全部物料装入桶内，密封再存放30min。
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| Someone says, "Time is money." But I think time is 1 important than money. Why? 2 when money is spent, we can get 3 back. However, when time is 4 , it will never return. That is why we mustn't waste time. It goes without saying that the 5 is usually limited (有限的). Even a second is very important. We should make full use 6 our time to do 7 useful. But it is a pity that there are a lot of people who don't know the importance of time. They spent their limited time smoking, drinking and playing. They don't know that wasting time means wasting parts of their 8 . In a word we should save time. We shouldn't leave today's 9 for tomorrow. Remember we have no time to 10 . | ||||
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