下列选项中说法正确的是（） ["流线是同一流体质点走过的轨迹（流线是某瞬时，空间曲线的切线和该点的微团速度指向一致的线）","迹线是对横向的间隔空间点按等时间间隔进行染色形成的染色线（迹线是同一流体质点走过的轨迹）","染色线是对同一空间点连续染色后形成的染色线","流动会穿越过流面（流面是流动不会穿越的一个面）"]
下列各项不产生现金流量的有（）。 ["本期核销的坏账","存货盘亏","以固定资产抵债","分配分配股票股利","收回以前年度巳核销的坏账"]
投资项目不确定性分析的主要目的在于（） ["找出对投资项目财务效益和国民经济效益影响较大的不确定性因素","判断各种不确定性因素对项目效益的影响程度","估算项目可能承担的风险","选择可靠的投资项目和投资方案","提高项目投资决策的科学性"]
Certkiller .com has a software evaluation lab. There is a server in the evaluation lab named as CKT. CKT runs Windows Server 2008 and Microsoft Virtual Server 2005 R2. CKT has 200 virtual servers running on an isolated virtual segment to evaluate software. To connect to the internet， it uses physical network interface card. Certkiller .com requires every server in the company to access Internet. Certkiller .com security policy dictates that the IP address space used by software evaluation lab must not be used by other networks. Similarly， it states the IP address space used by other networks should not be used by the evaluation lab network. As an administrator you find you that the applications tested in the software evaluation lab need to access normal network to connect to the vendors update servers on the internet. You need to configure all virtual servers on the CKT server to access the internet. You also need to comply with company’s security policy. Which two actions should you perform to achieve this task（） ["Trigger the Virtual DHCP server for the external virtual network and run ipconfig\/renew command on each virtual server","On CKT’s physical network interface， activate the Internet Connection Sharing （ICS）","Use Certkiller .com intranet IP addresses on all virtual servers on CKT.","Add and install a Microsoft Loopback Adapter network interface on CKT. Use a new network interface and create a new virtual network.","None of the above"]
职业道德“爬坡论”和职业道德“滑坡论”是对当前中国职业道德发展现状的颇有代表性的总结。下列职业道德“爬坡论”和职业道德“滑坡论”的说法正确的是（） ["“滑坡论”的支持者认为，社会发展必然会带来职业道德水平的提升，尽管当前职业道德现状并不能完全满足社会发展的要求，但加强职业道德建设的呼声却越来越强烈，对职业道德建设提出的要求也越来越高","两种观点都认为当前中国职业道德建设状况呈现出不断进步的态势，能够促进社会的发展","两种观点争论的前提条件是双方都一致认同的，即当前中国职业道德现状堪忧，不能满足社会经济文化快速发展的客观要求","“爬坡论”的支持者则认为，当前中国职业道德建设存在着诸多方面的问题，职业道德失范现象频频出现，职业信仰信念缺位等都是其表现。持这种观点的人不仅悲观地看待当前的职业道德现状，并且也对职业道德的建设前景持悲观态度"]
试述关汉卿风月爱情剧的特色及人物形象和性格特征。
