属于消化道隔离的疾病是() ["传染性非典型性肺炎","腮腺炎","气性坏疽","伤寒","非甲非乙型肝炎"]
片剂在包糖衣过程中,粉衣层常用的物料是() ["A.淀粉","B.硫酸钙","C.滑石粉","D.虫白蜡","E.阿拉伯胶浆"]
将氯气通入石灰中而制成的混合物为()。 ["次氯酸钠","漂白粉","液氯","氯化磷酸三钠","二氯异氰尿酸钠"]
一桥台的地基土是一般新黄土,天然含水量ω=22%,液限wl=28,天然孔隙比e=0.7,则该地基容许承载力为()kPa。() ["190","210","230","250"]
进行FS型碳化硅阀式避雷器的工频放电试验时,通过试品的工频电流应限制在()A之间,每次施加电压的时间间隔应不小于()S。
燃气热值的单位是什么?如何换算?