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【简答题】
设有三只琴键开关一字排开,初始状态为“关、开、关”,问连按三次后是否会出现“开、开、开”或”关、关、关”的状态?要求每次必须按下一个开关,而且只能按一个开关。请画出状态空间图。
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举一反三
【单选题】2017年9月,退休职工刘某取得的下列收入中,免予缴纳个人所得税的是
A.
退休工资5000元
B.
商场有奖销售中奖210元
C.
其任职单位重阳节发放补贴800元
D.
报刊上发表文章取得报酬1000元
【单选题】What does Dr Thomas probably think about the cost of the new weight?
A.
It is a small amount to pay for so much precious metal.
B.
It is difficult to judge the value of such an object.
C.
It is reasonable for an object with such an important function.
D.
It is too high for such a light weight.
【单选题】What does the passage say about the predictions made by Thomas Robert Malthus and Paul Ehrlich?
A.
They proved to be useful.
B.
They have not come true.
C.
They proved to be accurate.
D.
They have not drawn enough attention.
【单选题】—Why does Thomas speak through every discussion but never listen to the others? —That's what he ________ do. We used to hate that, but are used to it now.
A.
ought to
B.
can
C.
will
D.
might
【单选题】2017年9月,退休职工刘某取得的下列收入中,免予征收个人所得税的是( )。
A.
退休工资5000元
B.
商场有奖销售中奖210元
C.
其任职的单位重阳节发放补贴800元
D.
报刊上发表文章取得报酬1000元
【简答题】What does Doctor Thomas probably think about the cost of the new weight?
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