在气相色谱法中,某组分的保留时间为5min,空气的保留时间为1min,某组分的调整保留时间为()。
A.1min
B.2min
C.3min
D.4min
E.5min
参考答案:D
-Would you like to drink some coffee with some sugar or milk?
-Oh,I’d like some milk________the coffee.[ ]
A.added on
B.added to
C.added up to
D.added up
应不应该保持正常体重?