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
查看答案
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。()
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。()
数据库的外模式/模式映像,保证了数据与程序的逻辑独立性。()