QTZ100型塔式起重机具有固附着、内爬等多种使用形式,该塔机额定起重力矩和最大额定起重量分别为()。
A. 1000kN·m,80kN
B. 800kN·m,60kN
C. 600kN·m,40kN
D. 400kN·m,20kN
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On some projects, especially ones of smaller scope, activity sequencing, activity resource estimating, activity duration estimating, and () are so tightly linked that they are viewed as a single process that can be performed by a person over a relatively short period of time.
A. time estimating
B. cost estimating
C. project planning
D. schedule development
援救漂流的遇险船舶时,常把艇尾或艇首垂直对着难船船舷。()
A. 正确
B. 错误
航行中的船舶一旦发生火灾仅能依靠现有人力及()进行自救。
A. 总指挥
B. 耐火分隔
C. 消防设备
男性,27岁,3天前搬重物后感腰痛,伴右下肢放射痛,咳嗽、喷嚏时症状加重,不能下床活动,以前无类似发作史。查体发现,腰椎生理弧度消失,活动明显受限,直腿抬高仅达40°,加强试验阳性,右足外侧外踝部皮肤感觉过敏.右跟腔反射减弱,X线平片除腰椎生理弧度消失外;未见其他异常,尿常规正常。下列措施中哪一项不适宜采用()
A. 硬膜外麻醉下推拿
B. 手术治疗,椎板开窗减压髓核摘除
C. 卧硬板床休息及药物治疗
D. 骨盆牵引及理疗
E. 封闭治疗(硬膜外注射类固醇药物)