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【简答题】
用两种方法求解 z t 的MA无穷展式 (1-1.1 q -1 +0.3 q -2 ) z t =(1-0.3 q -1 ) a t 求 MA(∞) 展式
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举一反三
【简答题】A．related B．concentrated C．entitled D．assigned
【单选题】Subjects are said to be assigned randomly when
A.
they are assigned to experimental and control groups from a sample which is representative of the larger population.
B.
they each have an equal chance of being assigned to either the experimental or control group.
C.
they are assigned to experimental and control groups so that the groups differ on some critical variable before the experiment begins.
D.
neither the experimenter nor the subject knows whether the subject is in the experimental or control group.
【单选题】绝缘导线的安全载流量是指( )
A.
不超过导线容许工作温度的瞬时允许载流量
B.
不超过导线容许工作温度的连续允许载流量
C.
不超过导线熔断电流的瞬时允许载流量
D.
不超过导线熔断电流的连续允许载流量
【简答题】构成液压泵的基本条件是：
【简答题】A．conducted B．searched C．discussed D．assigned
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