[问答题] 简述流感的预防措施。

说明下列句中词的古义和今义自始合，苟有险，余必下推车。 小麦面筋组成及蛋白质在形成面筋时的作用是什么？ 生活经验告诉我们，家庭中的电灯、彩电、冰箱等家用电器之间的连接方式是（）联，它们的工作电压是（）。 Which two of these correctly describe Fibre Channel? （） [" supports multiple protocols"," works only in a shared or loop environment"," allows addressing for up to 4 million nodes"," allows addressing for up to 8 million nodes"," provides a high speed transport for SCSI payloads"," may stretch to a distance of up to100 km before needing extender"] 在下面四种物质中导热性能最好的是（）。 ["紫铜","低碳钢","不锈钢","铸铁"] 简述流感的预防措施。