i guess you are in nursing program right? 4 j( M, J1 U/ h8 |% Kdo not use translator. some of them do not make sense.% A' d* K. O' b4 [( k
try to use english "answer" website. it might help ) w. y0 ~. M) H8 @+ V* y: bi have one but i never use it. well, leave me messages on "duan xiao xi'