【判断题】Well-designed pre-reading activities should help the students better understand the text they are going to read.
【单选题】关于煮沸灭菌,下列哪项说法不当
D.
水中加入碳酸氢钠是因为碱性化学作用有助于杀灭细菌
E.
在2%碳酸氢钠溶液中煮沸灭菌有防止金属器械生锈的作用
【单选题】一Who designed this ? 一It by Tom in 1999. [ ]
【简答题】沟通的第四个层次是()? A交换看法 B一般谈 C陈述事实 D交流感情
【单选题】Choose the true statement regarding QoS pre-classify.()
A.
QoS pre-classify permits QoS decisions based on elements from the unencrypted IP packet.
B.
QoS pre-classify is required when encrypting voice.
C.
QoS pre-classify is an advantage to Service Providers transporting encrypted packets.
D.
QoS pre-classify is not designed for IPSec/GRE configurations.
【单选题】The training course to introduce you to the security check at the Airport. A) designs B) be designed C) designed D) is designed
【单选题】以下关于交换机根据OSI标准模型的层次分类的描述,错误的是______。
A.
交换机根据OSI标准模型的层次通常可分为第二层交换机、三层交换机和多层交换机
B.
第二层交换机中两个不同的VLAN之间可以直接通信
C.
第三层交换机是第三层路由模块直接叠加在二层交换的高速背板总线上的
D.
第四层交换机能够起到与服务器相连接的“虚拟IP”(VIP) 前端的作用