重要隐蔽单元工程及关键部位单元工程质量经施工单位自评合格、监理单位抽检后,由项目法人(或委托监理)、()等单位组成联合小组,共同检查核定其质量等级并填写签证表,报工程质量监督机构核备。 ["监理","设计","施工","工程运行管理"]
For which two actions can you use the TO_DATE function? () ["convert any date literal to a date","convert any numeric literal to a date","convert any date to a character literal","format 'January 10 1999' for input","format '10-JAN-99' to 'January 10 1999'"]
密接式车钩的客车回送时,原则上应附挂旅客列车回送。附挂货物列车回送时,应挂于(),但不得超过2辆。 ["头部","尾部","中部","任何部位"]
自杀率较高的精神疾病,包括() ["抑郁症","精神分裂症","酒精和药物依赖","人格障碍","神经症"]
下列药物能引起心动过速口干散瞳轻度中枢兴奋() ["东莨菪碱","阿托品","麻黄碱","美加明","普鲁本辛(丙胺太林)"]
请简述回流比对精馏操作的影响?