好发于2~4岁幼儿的儿童类风湿病为() ["全身型","多关节型,类风湿因子阳性","多关节型,类风湿因子阴性","少关节型","强直性脊柱炎"]
如果相邻两网元本端有R-LOS、R-LOF告警,另一端有MS-RDI、MS-REI告警,不可能的原因是() ["A、光纤单断或尾纤头脏、衰耗大","B、光纤完全中断","C、本端收光板故障","D、对端发光板故障"]
以下疾病,一般无关节症状的是() ["川崎病","风湿热","过敏性紫癜","系统性红斑狼疮","幼年型类风湿病"]
SGC出口温度持续过高,可以采取的措施包括()。 ["检查敲击系统","配煤以改善因煤种造成的挂灰过多","降低氧煤比","增加氧煤比"]
车辆上土挡脱轨复方法?
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