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【多选题】
推动股价变动的主要因素有( )A.
基本面因素
B.
技术面因素
C.
心理因素
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【简答题】某LTI离散时间系统的全响应为y(k)=[1-(-1) k -(-2) k ]u(k)，初始条件为y(-1)=0，y(2)=0.5，当f(k)=u(k)时，求描述该系统的差分方程。
【简答题】【判断题】以应用型为导向的管理学注重介绍管理学理论发展历史、现存的问题,以及一些新的研究动向。____
【单选题】The advantage claimed for repeating fairy stories to young children is that it ______.
A.
makes them come to terms with their fears
B.
develops their power of memory
C.
convinces them there is nothing to be afraid of
D.
encourages them not tn have ridiculous beliefs
【简答题】当输入f(k)=ε(k)时，某LTI离散系统的零状态响应为 y zs (k)=[2-(0.5) k +(-1.5) k ]ε(k) 求其系统函数和描述该系统的差分方程。
【单选题】The advantage claimed for repeating fairy stories to young children is that it ______.
A.
makes them come to term with their fears
B.
develops their power of memory
C.
convinces them there is nothing to be afraid of
D.
encourages them not to have ridiculous beliefs
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