什么是FTP服务？FTP服务器有什么用处？
从拉伸试验如何获得常用的力学性能数据？
Refer to the exhibit. Which statement is true about the output？（） ["The port on switch CAT1 is forwarding and sending BPDUs correctly.","The port on switch CAT1 is blocking and sending BPDUs correctly.","The port on switch CAT2 is forwarding and receiving BPDUs correctly.","The port on switch CAT2 is blocking and sending BPDUs correctly.","The port on switch CAT3 is forwarding and receiving BPDUs correctly.","The port on switch CAT3 is forwarding， sending， and receiving BPDUs correctly."]
根据《危险性较大的分部分项工程安全管理办法》建质【2009】87号文的规定，搭设高度（）m及以上的落地式脚手架工程必须专家论证。 ["20","30","40","50"]
以下关于市场调查的说法中，正确的是（）。 ["市场调查能为企业提供营销决策的依据","市场调查获取的信息是有限的","市场调查可以代替营销决策","不恰当的市场调查会对创造市场造成危害"]
存在主义
