当桥梁主塔(墩)塔身高于()m时,应在其顶端装设防撞信号灯。 ["10","20","30","40"]
诊断性刮宫对于排卵型功血下列哪项是正确的:() ["A.诊断性刮宫最适用于青春期功血","B.对于月经过多者,刮宫主要是为了止血","C.怀疑子宫内膜脱落不全者在月经来潮的第5天刮宫","D.怀疑黄体功能不全者在月经来潮的第5天刮宫","E.排卵期出血者绝对不能刮宫"]
下列不是眼球壁的组成的一项是 ["A.纤维膜","B.鞘膜","C.葡萄膜","D.视网膜"]
需与无排卵型功血鉴别的疾病是:() ["A.全身性疾病","B.妊娠并发症","C.生殖器感染","D.生殖器肿瘤","E.以上都是"]
在软弱围岩地段施工隧道时,应遵守的原则有()。 ["短进尺","强爆破","早喷锚","勤量测","紧封闭"]
实腹式压弯构件的实际包括()、()、()、()、()等内容