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【多选题】
关于振荡环节的频率特性,下列说法正确的是:A.
极坐标是位于三四象限的一个半圆
B.
对数幅频特性有两条渐近线，斜率分别为0和-2，转折频率为1/T。
C.
对数相频特性为0至-180度范围内的中心对称曲线。
D.
极坐标图是位于三四象限内的一段光滑曲线。
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举一反三
【简答题】设有一个三维数组，按面、行、列的次序顺序存放，数组有S个面，每个面有R行、C列，每个项仅占一个存储单元，首地址为X。那么该数组第i面、第j行、第k列的项的地址多项式表示为 。
【单选题】A firm should select the capital structure that:
A.
produces the highest cost of capital.
B.
maximizes the value of the firm.
C.
minimizes taxes.
D.
is fully unlevered.
【简答题】在鞍坐标准规定的鞍座包角有 θ=() 和θ=()两种。
【单选题】A manager should attempt to maximize the value of the firm by:
A.
changing the capital structure if and only if the value of the firm increases.
B.
changing the capital structure if and only if the value of the firm increases to the benefit of inside management.
C.
changing the capital structure if and only if the value of the firm increases only to the benefits of the debtholders.
D.
changing the capital structure if and only if the value of the firm increases although it decreases the stockholders' value.
【单选题】The author suggests that the recreative possibilities of greenspace Should ha provided ______.
A.
in special areas
B.
in the suburbs
C.
in the neighbourhood of the house
D.
in gardens and parks
【单选题】A manager should attempt to maximize the value of the firm by
A.
changing the capital structure if and only if the value of the firm increases.
B.
changing the capital structure if and only if the value of the firm increases to the benefits to inside management.
C.
changing the capital structure if and only if the value of the firm increases only to the benefits the debtholders.
D.
changing the capital structure if and only if the value of the firm increases although it decreases the stockholders' value.
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