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【多选题】
路由器的作用表现在 ( )A.
数据转发
B.
路由（寻径）
C.
备份、流量控制
D.
异种网络互连
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反馈参考答案：
举一反三
【单选题】Ⅰ. At a pedestrian crossing: a) When you have stepped off the pavement on to a zebra crossing, traffic must stop to let you cross. But don't be foolish: make sure that drivers have enough time to give...
A.
expect cars to stop for you
B.
cross without giving the driver enough time to stop
C.
step off the pavement
D.
expect drivers to give you enough time to cross
【简答题】应激原(stressor)
【单选题】When crossing the street, we can not be ______ careful.
A.
very
B.
quite
C.
too
D.
such
【单选题】A yellow taxi _______ alongside a truck at the traffic lights when an elderly woman was crossing the road.
A.
brought up
B.
took up
C.
pulled up
D.
put up
【简答题】压力源(stressor)
【简答题】What is a stressor?
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