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单项选择题

Bar Manager/Supervisor reports to Beverage Manager, taking charge of daily operations of bars. His job is not including  A.
To schedule staff B.
To oversees other bartenders’ performance C.
To review the inventory and keep records of supplies and money D.
To contact clients

问答题

设系统特征方程为s4+2s3+3s2+4s+5=0，试用劳斯-赫尔微茨稳定判据别系统的稳定性。