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A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)
A,B为n阶矩阵,cond(AB)<=cond(a)cond(b)。()

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If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil

A. increase the capacity of the coil
B. increase the superheat at the bulb
C. deliver more refrigerant to the coil
D. decrease the capacity of the coil

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A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)A,B为n阶矩阵,cond(AB)<=cond(a)cond(b)。()

If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil

如果cond(A)相对较小时，解的相对误差也小，则称AX=B为良态方程组。()

显示欧拉公式具有简单，精度低的特点。()

在yi准确的前提下,即yi=y(xi)时,用数值方法计算yi+1的误差Ri=y(xi+1)–yi+1,称为该数值方法计算yi+1时的局部截断误差。()

A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)A,B为n阶矩阵,cond（AB)<=cond（A)cond（B)。（)
A,B为n阶矩阵,cond(AB)<=cond(a)cond(b)。()