Which two statements are true about 802.1s？（） ["802.1s supports a reduced number of spanning-tree instances.","802.1s has better convergence times than 802.1w.","802.1s does not support load balancing over the same physical topology.","The CPU utilization for 802.1s is lower than the CPU utilization for 802.1w."]
场区内机动车装载易扬尘物质车辆发生扬尘掉落并未及时清理，属于（）问题。 ["红线","A1","A2","B"]
在统计工作过程中，统计整理主要是对（）的整理。 ["历史统计资料","统计分析资料","原始调查资料","综合统计资料"]
养蚕为什么要高标准消毒？
《铁路运输收入管理规程》大事故：损失金额（）元。 ["2万元及其以上，不足10万","1万元及其以上，不足10万","1万元及其以上，不足5万","2万元及其以上，不足5万"]
依恋
