17岁未婚少女，14岁初潮，月经周期不规则，2～3个月来潮一次，每次经期达10余日，量多，无痛经。本例恰当诊断应是：（） ["月经过多","子宫内膜不规则脱落","黄体功能不足","有排卵性功血","无排卵性功血"]
下列哪个国家没有受文化大革命影响而发生学生运动？（） ["法国","日本","印度","埃及"]
简述网上招聘优势。
原位生物修复
In which two ways does the BGP graceful restart capability preserve prefix information during a restart？（） ["The peer router sends an end-of RIB message to the restarting router","The peer router immediately removes the BGP routes that it learned from the restarting router from its BGP routing table","The restarting router does not remove any stale prefixes after the timer for stale entries expires","The router establishes BGP sessions with other routers and relearns the BGP routes from other routers that are also capable of graceful restart. The restarting router waits to receive updates from the neighboring routers. When the neighboring routers send end-of-RIB messages to indicate that they are done sending updates， the restarting router starts sending its own updates","The restarting router removes any stale prefixes after the timer for stale entries expire"]
二次系统传动实验的目的是什么？
