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[问答题] 庞大的蓝鲸以什么为食?

z=f(x,y)在P0(x0,y0)一阶偏导数存在是该函数在此点可微的什么条件?() ["必要条件","充分条件","充要条件","无关条件"] 优势半球内囊出血的患者,典型临床表现不包括() [""凝视瘫肢"状","同向性偏盲","失语","偏瘫","偏身感觉障碍"] 根据药品的安全性,非处方药可以分为几类() ["A.1","B.2","C.3","D.4","E.5"] 领导权力影响力的特点是() ["下属信服、尊敬","激励作用大","比较稳定","影响力持久","影响力有不可抗拒性"] 治疗癫痫持续状态的首选药物是() ["苯巴比妥钠","地西泮","卡马西平","苯妥英钠","10%水合氯醛"] 庞大的蓝鲸以什么为食?
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