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【判断题】
正常的使用变频器,必须认真地考虑散热的问题。变频器的故障率随温度升高而成指数的下降。使用寿命随温度升高而成指数的上升。环境温度升高10度,变频器使用寿命减半。A.
正确
B.
错误
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举一反三
【单选题】（安徽安庆2009教学质量监测） It is estimated by some experts that by the end of next year we a fall in house prices by 25%.
A.
will see
B.
see
C.
has seen
D.
will have seen
【简答题】( )是数据对象在计算机中的存储表示,也称为( )。
【单选题】What happened to the three judges?
A.
They were detained by the judicial department.
B.
They were prevented from their positions.
C.
They were threatened by the criminal gangs
D.
They justly judged Ms Escobedo's daughter's case.
【简答题】A．They got success with the track Park Life. B．They were defeated by Oasis. C．They were the rough working class rockers. D．They ranked No. 2 among the bands of the time.
【单选题】The experts estimated that the unemployment rate would reach ______
A.
3.5%
B.
3.8%
C.
3.28%
D.
6.6%
【简答题】研究表明，与适度学习相比较，学材料的熟练程度达到_________时，记忆效果最好。
【简答题】存储结构是数据对象在计算机中的存储表示,也称为( )。
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