单选题
发布日期:2021-03-22
proportional band
the error signal
the reset signal
feedback
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男性,52岁,发现右侧腹股沟区包块10年,站立时明显,平卧后消失,有时可降入阴囊,可还纳。查:右侧腹股沟区肿块,约8cm×6cm大小,可还纳,外环容3指,压迫内环后肿块不再出现。如上述病人行Halsted修补术,精索的位置是()
Precautionary measures must be taken to()safety of the steredortes, cargo and the ship.
实验室应通过实施质量方针和质量目标、应用审核结果、数据分析、纠正和预防措施以及管理评审来持续改进其管理体系的()。
测量误差产生的原因有:()、()和()三方面因素。
抽样检验对样品/样本的基本要求是指抽取的样品应当()。
药品广告不得含有的内容包括()
不能全额计提坏账准备的应收账款有哪些?
变压器的寿命是由绝缘(主要指匝绝缘)材料的()程度决定的,而绝缘材料的老化,主要取决于运行温度、绝缘材料结构中的氧气含量、含潮率等。
介电常数为ε的各向同性介质区域V中,自由电荷的体密度为ρ,已知这些电荷产生的电场为E=E(x,y,z),下面表达式中始终成立的是()。
紫外光的常见曝光方法有那些?
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---Mind the wheel! ---().