当经营杠杆系数是3，财务杠杆系数是2.5时，则综合杠杆系数是（ ）
A. 5.5
B. 0.5
C. 1.2
D. 7.5
息税前利率变动率相对于销售量变动率的倍数是（ )
A. 经营杠杆系数
B. 财务杠杆系数
C. 综合杠杆系数
D. 边际杠杆系数
The logic of approximate equality ( ).
A. Does not recognize the deviation of measurement data
B. Pursuits of a single goal
C. Believes in measurement data totally
D. Takes the measured data seriously
The least square method aims to reach the minimum value of ( ) to solve the inconsistent equations.
A. Residual sum of squares
B. Residual sum
C. Residual sum of absolute value
D. Maximum residual
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