【简答题】The astronauts and their achievements __________ you mentioned stimulate the youth much so that some of them are engaged in astronautics. [A]which [B] that [C] what [D] whom
【单选题】Virtual Private Networks(VPN) are networks deployed on a ( ) network infrastructure.
【简答题】 (Virtual Private Network)
【简答题】A.feed B.irritate C.push D.stimulate
【单选题】The light of this room was _____ dim (昏暗的) for Tom _____ read last night. [ ]
【多选题】S7-200 PLC的中断事件按优先级别从高到低依次是()。
【判断题】We will dim the cabin light when flying at night.
【单选题】Which of the following is true of a VPN (virtual private network)?
A.
A VPN communication is secure even though it is transmitted over the public Internet.
B.
One disadvantage of a VPN is that it does not encrypt messages.
C.
Remote access is difficult in case of a VPN.
D.
It is a physical, private pathway over a public or shared network from the client to the server.
【简答题】S7-200PLC中断优先级按从高到低的顺序是 、 、