进行电子银行客户维护的先决条件是如何找到电子银行合适的客户。
参考答案：对
― the shop for several years?
―No, it one year ago.[ ]
A. Has; been open; opened
B. Is, opened; opened
C. Has, opened; was open
D. Was, opened; was opened
男性，27岁，主诉：牙龈疼痛、出血、口腔腐臭，不敢刷牙3天，无发热。该患者牙龈疼痛最可能的原因是（）
A.口腔溃疡
B.牙龈坏死
C.口腔疱疹
D.更换牙刷
E.牙龈炎症
