四氮唑比色法可用于下列哪个药物的含量测定( )
A.炔雌醇
B.黄体酮
C.醋酸地塞米松
D.利多卡因
E.盐酸吗啡
参考答案:C
A smooth, tapered pin, usually of wood, used to open up the strands of a rope for splicing is called a (n)().
A.batten
B.bench hook
C.stabilizers
D.fid
混凝土电杆基础、铁塔预制基础、铁塔金属基础等,其超深在+100~+300mm时,应采用填土或砂、石夯实处理,每层厚度不宜超过()mm,夯实后的耐压力不应低于原状土。
A.100
B.150
C.200
D.300