多发性骨髓瘤细胞的特点包括() ["A．稳定易培养","B．是B细胞恶性肿瘤","C．自身不分泌Ig或细胞因子","D．是HGPRT缺陷株","E．融合率高"]
具有免疫原性的佐剂有() ["A．卡介苗","B．羊毛脂","C．细胞因子","D．多聚核苷酸","E．枯草分枝杆菌"]
患儿，女性，2岁，口腔溃疡3天，之前感冒发烧2天、体检：全口牙龈红肿，上腭及舌背粘膜见成簇的小水疱，部分已破溃为浅表溃疡，周围粘膜出血发红。本病可能的诊断为() ["A．鹅口疮","B．手-足-口病","C．疱疹性龈口炎","D．口炎型口疮","E．急性坏死性龈口炎"]
能在HAT培养基上生长繁殖的细胞有() ["A．正常培养细胞","B．TK缺陷细胞","C．HGPRT缺陷细胞","D．细胞多聚体","E．杂交瘤细胞"]
牙周炎的主要症状是______、______、______和______。
根分叉病变以______发病最多，______最低。
