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【判断题】
CSMA/CA中,SIFS最短。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】If you ________ faults but you still want the bicycle, ask the shop assistant to reduce the price. [ ]
A.
come across
B.
care about
C.
look for
D.
focus upon
【单选题】采用固定循环编程,可以( )。
A.
加快切削速度，提高加工质量
B.
缩短程序的长度，减少程序所占内存
C.
减少换刀次数，提高切削速度
D.
减少吃刀深度，保证加工质量
【简答题】流体流动时,有()和()两种状态之分,我们把()作为判断流动状态的标准,对于光滑的圆型金属管道,其临界值大致为( )。
【单选题】We regret being unable to reduce our price to your ____.
A.
level
B.
want
C.
wish
D.
price
【单选题】If you _____faults but you still want the bicycle, ask the shop assistant to reduce the price.
A.
come across
B.
care about
C.
look into
D.
look up to
【单选题】The shirt is so expensive. Can you reduce the price ________a third?
A.
to
B.
by
C.
of
D.
at
【简答题】The price (reduce) by 50% .
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