如果直线相关系数r=0。则一定有() ["直线回归的截距等于0","直线回归的截距等于或y或X","直线回归的

残等于0","直线回归的等

于0","直线回归的

等于

"]
早期肛裂的治疗方法有() ["熏洗法","外敷法","扩肛法","侧切法","纵切横缝法"]
牵拉技术主要应用于() ["由于软组织粘连或瘢痕形成,引起肌肉结缔组织和皮肤缩短关节活动范围降低","骨折未愈合","严重骨质疏松","肌肉韧带等软组织急性损伤,神经损伤或神经吻合术早期","关节内或关节周围组织有特异性炎症"]
男性,25岁。抽胸液过程中出现头晕、心悸、胸闷、出冷汗、面色苍白。下列处理恰当的是() ["A.静脉注射呋塞米、毛花苷丙","静脉推注葡萄糖","快速补液和吸氧","停止抽液,平卧观察","床边胸部X线片检查"]
男性,45岁,间断腹痛、腹泻3年,排便4~5次/天,便不成形,无脓血,黏液,服小檗碱(黄连素)、诺氟沙星可稍缓解,近半月症状加重.大便7~8次/天,查大便常规正常,大便无脂肪滴。用哪种检查确诊最可靠() ["A.大便常规加潜血","结肠镜","查血CEA","直肠肛管测压","钡灌肠"]
雌、孕激素在生理作用上有哪些协同作用?