精确
.技能要求是工作人员达到工作要求的速度、精确程度及其所需的操作能力，其中（ ）一般是反映生产产品、调配设备的精确程度。
.技能要求是工作人员达到工作要求的速度、精确程度及其所需的操作能力，其中（ ）一般是反映生产产品、调配设备的精确程度。 B
现有一含杂质的固体BaCl2样品（杂质不溶于水），取12.5g样品放入烧杯中，然后加入39.6g水使其充分溶解，静置后滤去杂质．取10g滤液，加入100gAgNO3溶液，恰好完全反应生成白色沉淀，过滤后得到107.13g溶液，试计算：（计算结果精确到0.1％） （1）生成白色沉淀多少克； （2）10g滤液中溶质的质量分数； （3）样品中BaCl2的质量分数．
现有一含杂质的固体BaCl2样品（杂质不溶于水），取12.5g样品放入烧杯中，然后加入39.6g水使其充分溶解，静置后滤去杂质．取10g滤液，加入100gAgNO3溶液，恰好完全反应生成白色沉淀，过滤后得到107.13g溶液，试计算：（计算结果精确到0.1％） （1）生成白色沉淀多少克； （2）10g滤液中溶质的质量分数； （3）样品中BaCl2的质量分数．
In this book the writer gives us a(n) _____ picture of social history.
In this book the writer gives us a(n) \_\_\_\__ picture of social history.
His decision was _____, since he could not see the action from where he was standing.
His decision was \_\_\_\__, since he could not see the action from where he was standing.
Practice 9 Generally, however, modern examinations are, written. (1) The written examination, where all students are tested on the same question, was probably not known until the nineteenth century. Perhaps it came into existence with the great increase
Practice 9 Generally, however, modern examinations are, written. (1) The written examination, where all students are tested on the same question, was probably not known until the nineteenth century.
如果用一把最小刻度是毫米的刻度尺量出某物理量的长度是764.5毫米，则这里的有效数字是____位，数值中的数字____是估计出来的，是不可靠数字．
如果用一把最小刻度是毫米的刻度尺量出某物理量的长度是764.5毫米，则这里的有效数字是\_\_\_\_位，数值中的数字\_\_\_\_是估计出来的，是不可靠数字．
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