Which of these is a benefit of using Network Admission Control instead of Cisco Identity Based Networking Services？（） [" NAC can authenticate using 802.1X and IBNS cannot"," NAC can ensure only compliant machines connect and IBNS cannot"," NAC can ensure access to the correct network resources and IBNS cannot"," NAC can manage user mobility and reduce overhead costs and IBNS cannot"]
流行性感冒的确诊的主要依据是（） ["发病季节","呼吸道症状轻微而全身中毒症状重","病毒分离","血凝抑制试验"]
蛋白质是生物体内普遍存在的一种主要由（）组成的生物大分子。 ["氨基酸","脂类","脱氧核糖核酸","核糖核酸"]
邮政法规定的包裹是什么？
子曰："君子易事而难说也：说之不以道，不说也；及其使人也，器之。小人难事而易说也；说之虽不以道，说也；及其使人也，求备焉。"
翻译古文
黑矿型块状硫化物矿 床
