【单选题】—Jack, this is the third time that you have been late this week. —Sorry, sir, but I was _____ for 15 minutes on the way.
【单选题】用交换机连接两个不同速率的局域网,由两个网段组成扩展局域网,下列说法错误的是________
【单选题】The Clarks' three sons Tom, John and Jack are 12, 14 and 15 years old ______.
【判断题】调车指挥人须确认调车进路上的所有道岔位置正确并锁定、调车进路准备好、人员处于安全位置后,方可向司机显示道岔开通信号,发出动车指令。
【判断题】调车指挥人须确认调车进路上的所有道岔位置正确、调车进路准备好、人员处于安全位置后,方可向司机显示道岔开通信号,发出动车指令。
【多选题】道岔位置正确指的是
C.
开放信号时,进路上有关的道岔应处于开通该进路的位置
【单选题】局域网中同一网络的数据交换是通过交换机传输,不同网络间的通讯是通过( )
【单选题】How much lime does it take Jack to learn the Knowledge?
【单选题】We learn from the passage that_____.
A.
Scott McGinnis has been a Chinese teacher for 15 years
B.
Jackie Chan is a Chinese teacher at McCormick Elementary School
C.
Chicago officials ire required to learn Chinese
D.
Scott McGinnis is good at giving his opinions on everything
【单选题】CCB II制动机自阀手柄( )时实施紧急制动,也用于惩罚(安全)制动和紧急制动后的复位。