牙龈癌的治疗原则() ["A．早期牙龋癌无需行牙槽突切除","B．较晚期者应作下颌骨或上颌骨次全切除","C．侵人上颌窦者应行全上颌骨切除","D．下颌牙龈癌原则上应作同侧颈淋巴清扫","E．早期上颌牙龈癌属N0也应作颈淋巴清扫"]
口底癌的治疗原则() ["A．切除原发灶常需一起行下颌骨牙槽突或方块切除术","B．应同期行颈淋巴清扫术","C．双侧颈淋巴结转移者应行双侧颈淋巴清扫术","D．术后放疗","E．以上均不是"]
上颌窦癌的治疗原则() ["A．以手术治疗为主的综合治疗","B．原则上应行上颌骨全切术","C．波及眶下板者应行上颌骨并眶内容物切除","D．波及其他部位者应行上颌骨扩大切除术","E．波及颅底者可行颅颌面联合切除术"]
舌癌大约_____以上发生在舌体，且多数发生在____侧缘部，大多数为_______，少数为______、_______或_______等。
血钙测定的血液标本可用() ["A．草酸盐抗凝血浆","B．肝素抗凝血浆","C．EDTA抗凝血浆","D．枸橼酸钠抗凝血浆","E．血清"]
恶性肿瘤应根据肿瘤的________、_________、________、________、_______、_________等全面研究后再选择适当的治疗方法。
