不是输油泵因传感器误信号造成意外停运的有效方法的是() ["A.摘除联锁","B.设置信号延时滤波","C.更换性能好的传感器","D.降低现场信号干扰源"]
百合栽植后() ["A、可进行中耕","B、不宜中耕","C、花前及花期增施磷钾肥","D、花前及花期增施氮肥","E、花前及期可不施磷钾肥"]
肝病并发DIC时,你认为下列哪一组试验最有诊断价值() ["因子Ⅷ∶C降低,vWF∶Ag增高,vWF∶Ag/因子Ⅷ∶C增高","APTT、PT,TT均延长","AT-Ⅲ、PC、纤溶酶原降低","血小板β-TG、PF4和血清FDP均增高","3P试验(+),FDP含量增高"]
将热电阻从输油泵现场引线接入PLC系统时,为减少线路电阻的变化导致的测量误差引起温度超高保护联锁失效和误动作,应尽可能采用()的接线方法 ["A.两线制","B.三线制","C.恒定接线端温度","D.直流电路"]
安全帽有什么作用?
何谓清除障碍原线开通法?