下面程序中，新数据集中保存的变量是什么？ l data temp（drop=temprature group); set colors（keep=temprature date rain group); if group=2; run;A．rainB．date,rainC．date,rain,groupD．date,rain, _No_
下面程序中，新数据集中保存的变量是什么？ l data temp（drop=temprature group); set colors（keep=temprature date rain group); if group=2; run;
A．rain
B．date,rain
C．date,rain,group
D．date,rain, _No_
参考答案和解析
一旦将数据存入某变量,以后就不能将新的数据存入该变量
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