If you submit the following program, which variables appear in the new data set? data work.cardiac(drop=age group); set clinic.fitness(keep=age weight group); if group=2 and age>40; run;
【简答题】Which problems are unique to or heightened by teleconferences?Extract 1: ______________________________ Extract 2: ______________________________Extract 3: ______________________________Extract 4: ...
【简答题】____________ ____________ can be used to squeeze negotiations into the last remaining minutes of a meeting in order to extract concessions from one party.