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【单选题】
Ⅱ级应急响应的安全事故突发事件是指铁路客票系统由于外部故障、设备损毁、数据丢失等原因，导致全路客票系统中断4小时以上，造成经济损失严重影响全国铁路运输生产，北京、上海、广州地区高峰时段中断()，造成经济损失及严重社会影响。A.
6小时以上
B.
4小时以上
C.
5小时以上
D.
2小时以上
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【单选题】Some of the most popular attractions across America are the many free concerts offered to public throughout the year. These involve not only amateur performers, but professional artists as well. The p...
A.
have the necessary facilities
B.
call attract more visitors
C.
want to serve the public
D.
are in a position to invite musicians
【单选题】Some of the most basic concepts of psychology were defined by Sigmund Freud and two of his followers, Alfred Adler and Carl Gustav Jung. Sigmund Freud, an Austrian neurologist, was the founder of psyc...
A.
denial of instinctive behavior. in animals and humans
B.
belief that religion properly molded the conscience so that the id could be controlled
C.
belief that human behavior. can be explained primarily by the unconscious motives of individuals
D.
belief that human behavior. is completely controlled by the 'conscience' part
【简答题】听力原文：Some of the most dramatic climaxes in the history of Olympic s have taken place in the women's 4×100 relay, the most exciting race in the track and field competition, a combination of speed a...
【单选题】Wetlands are some of the most biologically productive natural ecosystems in the world, comparable to tropical rain forests and coral reefs in their productivity and the diversity of species they suppo...
A.
Y
B.
N
C.
NG
【单选题】What is the ultimate purpose of science? This question has challenged some of the most profound scholars of the past. It is of increasing【B1】today, not only to practicing research scientists but to no...
A.
concern
B.
care
C.
attention
D.
worry
【单选题】假如一台连接到网络上的计算机的网络配置为：IP地址为136.62.2.55，子网掩码为255.255.192.0，网关地址为136.62.89.1。这台计算机在网络中不能与其他主机进行通信。其中设置导致了问题产生的是（ ）。
A.
子网掩码
B.
网关地址
C.
IP地址
D.
其他配置
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