管片拼装控制的具体内容包含螺栓紧固扭矩和（）。 ["管片漏水","密封条压缩量","真圆度","管片裂缝"]
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（） [" PIN photodiodes"," zero-chirped lasers"," Erbium-doped fiber amplifiers"," dispersion compensating fiber"," dispersion compensating Bragg grating"]
如何正确合理地使用化学消油剂？
抑郁症患者，社会功能、行为方面的护理重点（） ["防止伤人毁物","防止自杀","A＋B","帮助与环境的接触","使用安全契约"]
依法治税必须坚持以马克思主义基本理论为指导，坚持党的领导，具体来说应坚持三项原则，下列不正确的是（）。 ["坚持群众的观点","坚持民主集中制的原则","坚持实践的观点","坚持实事求是的原则"]
瀑布模型的主要思想和特点是什么？
