预应力筋张拉施工中,当设计未规定时,孔道内的水泥浆强度应不低于砂浆设计强度的()。 ["75%","85%","70%","80%"]
已知如图所示的文丘里管流量计,管的直径d1=6cm,d2=2cm,1断面与喉管断面的测压管水头差为Δh=8cm ,如果文丘里管流量计流量修正系数μ=0.98,求管路中通过流量Q为多少?(不计水头损失)
人民法院依法裁定假释的最长时限为() ["一个月","二个月","三个月","四个月"]
系统风险会导致所有证券商品价格都会发生动荡。
During the installation of the Cisco WCS, an error occurs. Where will the installation log be found?() ["at the root of the installation drive","in the Cisco WCS installation directory","on the desktop of the server","in the Cisco WCS\\Logs directory"]
根据润滑剂的不同,润滑可分为