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热电偶补偿导线的作用是什么?
非牛顿液体在管壁上产生滑移的原因。判断各种因素对入口效应和离模膨胀的影响。
以下有关发电机转子穿装工艺要求正确的是( )。
从现代流行病学的观点出发,判断研究因素与非传染性疾病之间存在因果联系必要的条件不包括()
一般当流速超过3m/s,应采用粒径()cm以上的石块或石笼进行加固,但均不宜投得过多,以免影响排洪断面和造成其他桥墩的冲刷。
海况良好时,灵敏度调节应调();海况恶劣时,灵敏度调节应调()。
农业转基因生物标识由()负责标识。
如何衡量港口的能力?
男性,28岁,活动后心悸、气促1年,2年前有心肌炎病史。查体:血压140/90mmHg,心脏叩诊浊音界扩大,心尖冲动及第一心音减弱,心尖部有3/6级收缩期杂音,心率110次/分,频发期前收缩,双肺底少量湿啰音,颈静脉怒张,肝肋下3cm,双下肢轻度水肿,心电图示频发室性期前收缩不适合于该患者的治疗措施是()
下列关于委托授权与委托合同的区别的论述中,正确的包括( )。
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