日戳盖于业务单据上起到（）的作用。
A、区分处理日期
B、表示何局何时收寄
C、确认与用户之间关系印信
D、骑缝密封
参考答案：A
Ideally ________ for Broadway theaters and Fifth Avenue, the New York Park is a favorite with many
guests. [ ]
A. located
B. locating
C. being located
D. having been located
男性，45岁，因患脓胸而行手术引流，虽经充分引流，仍持久不愈，这种情况一般和下列哪项无关（）
A.异物存留
B.肺扩张受限
C.脓液的稠密度
D.支气管胸膜瘘
E.未被发现的肺结核
