怎样保证注射模合模的方向性？
参考答案：为了保证注射模合模的方向性，可将导柱做成两大两小，一大两小，或导柱直径相等，但其中一根位置错开3～10mm。
扫描必须包括上纵隔的疾病是
A．甲状腺结节B．甲状腺囊肿C．甲状旁腺瘤D．弥漫性甲状腺肿E．巨大腺瘤样甲状腺肿
The nurse is caring for a client with otosclerosis scheduled to undergo a stapedectomy. The client asks the nurse when her hearing will improve. Which response by the nurse is most appropriate ？（）
A．Your hearing may not improve but you'll no longer be bothered by tinnitus.
B．Your hearing may be dramatically improved right after surgery.
C．You may notice improved hearing within 1 to 2 weeks.
D．Your hearing may improve 3 to 6 weeks after surgery.
