患者男性,25岁,因“左上3慢性根尖周脓肿,行根管充填2天,肿痛”来诊。口腔检查:唇侧黏膜红肿。X线片:左上3根尖周骨质破坏区内有大量超填物。根尖倒预备完成后,进行根尖倒充填,最佳倒充填材料应选择()
A. 玻璃离子水门汀
B. 银汞合金
C. 三氧化矿物盐聚合物(MT
D. 复合树脂
E. 氧化锌丁香油糊剂
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刘先生不幸遭遇工伤事故,但是单位推脱责任不帮其申请工伤认定。这种情形刘先生可以自己申请工伤认定?必须在什么时间内申请?
Two Company switches are connected via a trunk link. In this network, the original frame is encapsulated and an additional header is added before the frame is carried over a trunk link. At the receiving end, the header is removed and the frame is forwarded to the assigned VLAN. This describes which technology?()
A. DISL
B. ISL
C. DTP
D. IEEE 802.1Q
E. MPLS
F. None of the other alternatives apply