单项选择题

A．and
B．but
C．so
D．however
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单项选择题
A．resultedB．compoundedC．derivedD．changed
A．resulted
B．compounded
C．derived
D．changed
单项选择题
A．managementsB．managerialC．managersD．management
A．managements
B．managerial
C．managers
D．management
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