男,38岁。右上第一磨牙牙髓治疗后劈裂,拔牙过程中牙冠碎裂至龈下,牙根与周围骨质粘连。拔牙过程中发现其腭侧根消失,牙槽窝空虚,此时应当()
A. 立即停止操作,拍X线片
B. 立即扩大牙槽窝取根
C. 立即行上颌窦开窗取根
D. 翻瓣去骨取根
E. 延期拔除患牙
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船公司高速船在开始营运前,应以手册的形式编制下列资料和指南:航线运行手册;船舶操作手册;船舶保养手册;维修计划。上述各项手册所应包含的内容由主管机关确定。
A. 正确
B. 错误
A developer is designing a multi-tier web application and discovers a need to hide the details of establishingand maintaining remote communications from the client. In addition, the application needs to find,in a transparent manner,the heterogeneous business components used to service the client’s requests. Which design patterns, working together, address these issues?()
A. Business Delegate and Transfer Object
Business Delegate and Service Locator
C. Front Controller and Business Delegate
D. Intercepting Filter and Transfer Object
申请食品添加剂生产许可时,属于国家产业政策调整范围的产品,应当有()以上国家产业政策主管部门的有效证明。