IX3000已成功应用于哪些行业（）
A.电力/石油
B.国家/省级部委
C.银行/证券
D.移动运营商
参考答案：A, B, C, D
Being able to speak another language fluently is a great________when you are looking for a job.[ ]
A. assistance
B. chance
C. advantage
D. importance
下列哪种情况可进行桩冠修复
A．未经完善根管治疗的患牙B．牙槽骨吸收超过根长的1/3C．牙根有足够长度者D．根管弯曲、细小E．根管壁有侧穿
