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【简答题】
所谓显著性检验是为了判断测定结果或分析方法之间是否存在 。其中 t 检验法用来评价分析方法的 (填准确度或精密度) ;而 F 检验法则用来检查测定值的 (填准确度或精密度) 有无显著性的差异。在对某一试样的两组分析数据的平均值进行比较时,进行 检验,再酌情进行 检验。如经检验表明不存在显著性差异,则说明这些差异是由 误差引起的。
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【简答题】try to match
【简答题】Michel is a young girl who works for the police 21 a handwriting expert. She has helped 22 many criminals by using her special talents When she was four, Michel was already 23 interested in the ...
【多选题】What are the minimum requirements for police recruits?
A.
at least 20 years old the day of the written test
B.
a U.S. Citizen
C.
a permanent resident alien with an application for U.S. citizenship
D.
at least a college degree from a US college
【单选题】What does the woman hope the man to do?
A.
To report the driver to the police.
B.
To ask for some compensation from the driver.
C.
To go in search of the driver.
D.
To be more careful next time.
【简答题】try to match
【单选题】The police are still investigating what might be ___________ for the fire.
A.
lit
B.
blamed
C.
put
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