【单选题】以下关于H3C产品的描述,真确的有()
A.
MSR系列路由器主要应用于大型网络的骨干和核心
C.
ER系列路由器主要应用于大型网络的骨干和核心
【单选题】下列关于自然实验法的理解,正确的是( )。
【单选题】If you are using a Class C network ID with two subnets and need 31 hosts per network, which of the following masks should you use?
【单选题】If you are using PowerPoint, what should you keep in mind?
A.
Use various colors to illustrate.
B.
Put lots of text on a slide.
C.
Use easy-to-read fonts.
【单选题】下列关于自然实验法的理解,正确的是( )