【单选题】测定铵态氮肥中含氮量的国家标准方法是( )
【单选题】关于蒸馏滴定法测定铵态氮肥中总氮含量,说法正确的是( )。
B.
该方法用到的蒸馏装置和植物样品全氮测定的半微量凯氏定氮法所用装置一致
C.
该方法只适用于强酸性铵态氮肥中总氮含量的测定
D.
该方法的用到的酸碱指示剂和植物样品全氮测定的半微量凯氏定氮法相同
【简答题】请出示机票及您的健康证明书。 May I have your ticket and _____________?
【单选题】铵态氮肥中氮含量测定的国家标准方法中,适用于所有铵态氮肥的方法是 ( )?
【单选题】Generally, data mining (sometimes called data or knowledge discovery) is the process of analyzing data from different perspectives and (1) it into useful information information that can be used to in...
【单选题】测定铵态氮肥中含氮量的国家标准方法是( )。
【单选题】Regarding data mining, which of the following is INCORRECT?
A.
Data mining is a process where knowledge is drawn from a large amount of data.
B.
All patterns obtained by data mining are interesting.
C.
User interaction with data mining process may lead to better results.
D.
Data mining process may interact with existing knowledge bases, and the patterns generated can also be integrated into the knowledge bases.