重庆市各区县（自治县）城建档案管理工作，由所在地区的（）负责。
A. 档案行政主管部门
B. 建设行政主管部门
C. 市政主管部门
D. 园林主管部门
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出现双眼左侧视野同向偏盲，且偏盲侧瞳孔直接对光反射消失，其病损部位在（）
A. 左侧视束
B. 右侧视束
C. 视交叉
D. 左侧视辐射
E. 右枕叶
In Multicast VPN （MVPN） implementations， which two of the following statements are regarding the DefaultMDT Group？（）
A. It is used for PIM control traffic
B. It is optionally configured for a high bandwidth multicast source to reduce multicast traffic replication to uninterested PE routers
C. Within the VPF configuration in the PE router， multiple Default MDT groups are configured so each VPF can support multiple multicast sources
D. There is a reduced multicast state in the MPLS core P routers
E. When multicast traffic exceeds a certain configured threshold， traffic from the Data MDT is switched to the Default MDT to conserve bandwidth
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