Which of the following systems feature a set of integrated software modules and a central data repository that enables data to be shared by many different business processes and functional areas throughout the enterprise?
A.
Enterprise systems
B.
SCM systems
C.
CRM systems
D.
KM systems
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【单选题】过点C(4,0)的直线与双曲线 x 2 4 - y 2 12 =1的右支交于A、B两点,则直线AB的斜率k的取值范围是( )