建筑装修材料按其燃烧性能可划分为A级、B1级、B2级、B3级四级，对于装有贵重机器、仪器的厂房或房间，其顶棚和墙面应采用（）级装修材料。 B3。 B2。 B1。 A。
You work as the IT professional in an international company which is named Wiikigo. You are experiencedin implementing and administering a network operating system. You are specialized in deploying servers，configuring Windows Server 2008 Terminal services and network application services， and configuring aweb services infrastructure. You have a server named S01 that runs Windows Server 2008. The server hasthe Web Server （IIS） server role installed. You have an SMTP gateway that connects to the Internet. Theinternal firewall prevents all computers， except the SMTP gateway， from establishing connections overTCP port 25. You have the SMTP gateway configured to relay e-mail for S01. You have to configure aWeb site on S01 to send e-mail to Internet users. What action should you perform？（） An MX record for S01 should be created on an internal DNS server.。 An MX record for the SMTP gateway should be created on an internal DNS server.。 The SMTP Server feature should be installed on S01.。 The SMTP E-mail feature for the Web site should be installed on S01.。
浮游生物
指纹的三大基本类型，是指弓形纹、箕型纹和（） 圆型纹。 斗型纹。 线型纹。 畸形纹。
架桥机跨内斜吊桥面梁施工工艺是架桥机在跨内直接提升桥面梁并吊装就位，其原理的关键点是：吊装过程中使桥面梁倾斜一定角度，（）。 保证桥面梁水平投影长度等于盖梁间净距。 保证桥面梁水平投影长度等于盖梁间中心距。 保证桥面梁水平投影长度小于盖梁间净距。 保证桥面梁水平投影长度小于盖梁间净距。
运行速度比较快，且又能显示图形效果的预览方式是哪一种？（）
