胶圈接口时,纵坡大于()%时,应采取防止管道下滑的措施。 ["12","15","18","20"]
按重力相似准则设计模型,若几何比尺为25,则流速比尺为()。 ["10","20","5","100"]
受到罚款处罚的人应当自收到处罚决定书之日起(),到指定的银行缴纳罚款。 ["三日内","七日内","十日内","十五日内"]
评价一种化疗药物的临床价值,主要采用下列哪项指标() ["抗菌谱","抗菌活性","最低抑菌浓度","最低杀菌浓度","化疗指数"]
按《证券法》规定,A股上市公司总股本不得少于()人民币。 ["500万元","1000万元","5000万元","1亿元"]
爆燃和早燃有什么区别?