问题
单项选择题 A1/A2型题
室内空气采样时要记录室温和大气压力，这两个参数在采样中的作用是（）。
A.判断污染物在空气中存在的状态
B.将采样条件下的采样体积换算成标准状况下的采样体积
C.判断空气中污染物浓度高低
D.决定选用哪种分析方法
E.决定选用哪种采样方法
答案
参考答案：B
解析：换算后使样品各项检测指标具有可比性。
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室内空气采样时要记录室温和大气压力，这两个参数在采样中的作用是（）。
A.判断污染物在空气中存在的状态
B.将采样条件下的采样体积换算成标准状况下的采样体积
C.判断空气中污染物浓度高低
D.决定选用哪种分析方法
E.决定选用哪种采样方法
参考答案：B
解析：换算后使样品各项检测指标具有可比性。
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| Food is important. Everyone needs to 1 well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is 2 . We begin to get knowledge even when we are young. Small children are 3 in everything around them. They learn 4 while they are watching and listening. When they are getting older they begin to 5 story books, science books…, anything they like. When they find something new, they have to ask questions and 6 to find out the answers. What is the best 7 to get knowledge? If we learn 8 ourselves, we will get the most knowledge. If we are 9 getting answers from others and don't ask why, we will never learn more and understand 10 . | ||||
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